Murgy

Hi! I'm Murgy. I've been building in Second Life for ... I think four years now. Since before sculpties existed. I have tons of ideas, but not enough time. I can't do everything, so I made these tutorials in the hopes that some of you might be able to make some of the things that I never will.

Happy Accident - Trippy Signage

Blog, MV-SL-General, Show and Tell 5 Responses »
Apr 262010

Late this week, I was experimenting with figuring out alpha sorting on Sculpted Prims, when I happened across a very strange phenomenon.  The product looks something like Lenticular printing, where the image changes depending on the angle that you view it at.

The effect is more intriguing in world.  You can see a nice big wall-size display at my mall space in Midgar (click here to teleport).  My spot is directly up the stairs on the left.  Just alt cam or walk back and forth and you’ll see what it does.

So how did this happen?  It has to do with alpha sorting and how it applies to sculpted prims.

When two surfaces with alpha channels overlap, Second Life (or any other game platform) has to determine which surface belongs on top.  The builder usually hopes that whichever surface is physically closer to the camera will always be on top, but for Second Life and other gaming programs, determining what’s on top isn’t always straight forward.  When SL can’t figure it out, we get the phenomenon often called “Alpha Clipping.”

So it happens that I was trying to figure out more about alpha sorting and how it relates to sculpted prims, because unlike most other prim types, sculpted prims can overlap themselves, so I was wondering how SL sorted an alpha channel on a single sculpted prim.  From previous experience with sculpted prims, I hypothesized that faces on a sculptie that were defined by pixels at the top of a sculpt map would be alpha sorted in front of faces defined by the bottom of the sculpt map.  So:

To test this, I created a plane sculptie, folded accordion style from back to front, then in SL, I placed an alphabet grid texture on the prim and set the transparency to 5.  As predicted, the faces at the top of the sculptie (letters a-d) were always sorted before those at the bottom (m-p).

So I got that one right.  Top pixels always show up in front of the bottom pixels on a sculpt map.  Now what I didn’t know was which pixels, from left to right, does SL put on top.  So I rotated the sculpt map by 90 degrees (I rotated the image in Photoshop, NOT the mesh in Blender.  Rotating the mesh in Blender would do nothing, as it’s the position of the pixels on the image that matters.  The position of the vertices in 3D space makes no difference.)

I had predicted, purely from logic, that SL would sort the pixels on the left above the pixels on the right.  But I was wrong. Instead of cleanly sorting the surfaces of the accordion, SL did something weird.  As you can see on the image above, on the left side of the sculptie, the front of the sculptie is sorted on front, but on the right side, the BACK is sorted in front, and in the middle there are these lines like a set of blinds.  When you cam from left to right, the lines in the middle move, so if you are looking at it from one side or the other, either the back or front image will be completely visible.

The effect reminded me of those pictures that change depending on what angle you view them at, so I figured I’d make something like that.  I made an M shape sculptie, which allows for images on both sides of the prim, and I also made an N, which only has the effect on one side, but allows for higher-quality images.

I’m not sure if there’s any practical application for this other than the “Ooo SHINY” factor, but its kinda cool anyway. I was thinking of selling some sort of kit with the sculpties and a texture with guides so people could make their own trippy signage, but like.. Idunno.  I’m really not sure how many people would WANT that.  xD

Posted by Murgy at 11:16 am Tagged with: , , , ,

Sculptie Stitch Type

Mesh, MV-SL-Tutorials, Tutorials 9 Responses »
Apr 102010

In this tutorial you will learn some unique ways to use stitch types with your sculpties, such as making sculpt ends that are a line instead of a single pinch point.

What are Stitch Types?

Stitch types determine how Second Life interprets the edges of a sculpt map in order to render your sculpted prim.

Plane Stitching

Plane stitching is like a square piece of cloth, or like a sheet of paper. When you select this stitch type, Second Life does not assume that any of the edges of your sculptie will touch each other.

You can manually put the edges together yourself, but Second Life will not try to “fill in” between the seams. This can be useful for things like landscape sculpts and table cloths.

Note that in SL, only one side of a plane mesh is visible.  The other side will be completely transparent.  For example, if you make a table cloth with a plane sculptie, the underside will be invisible.

Cylinder Stitching

Cylinder stitching is like wrapping that cloth around and sewing two sides together, to make it into a tube.  We can still bend and stretch the tube however we want, but now two sides MUST remain together.

When you use this stitch type, if the left and right edges of your sculptie don’t touch, Second Life will automatically fill that information in so that they do. However, the top and bottom may remain open.  You can, of course, close the top and bottom manually (which is something that I do OFTEN!  Keep reading.)

The inside of the cylinder will be invisible, like the underside of the plane.

Torus Stitching

Imagine that we stretch the cylinder so that it’s really tall and skinny, then bend it around into the shape of a donut so that the top and bottom meet.  This is like “Torus” stitching in Second Life, where Second Life assumes that the left/right, and top/bottom sides will be stitched together.

If you use this stitch type and the edges of your sculpt don’t meet, once again, Second Life will attempt to fill in between the edges anyway.

Sphere (default) Stitching

Lastly, instead of making a torus, imagine taking the cylinder and pinching the top and bottom into a single point.  This is Sphere stitching, and is the default stitching in Second Life.  It assumes that the top and bottom of your sculpt map will come to a single point.

If you use this stitch type, even if the top and bottom of your mesh are something other than a point, Second Life will FORCE them into a point anyway.  This is the main reason why sphere stitching is often not the best stitch type to use.

Because all of the ends on Sphere and Torus stitching are closed up, you will never see the invisible side of these sculpted prims.

Using Stitch Types

You might be looking at this information and wondering what the point is. After all, many people seem to get along fine with just the default sphere stitching.  Maybe you can see a use for some of them, like making loop-type objects with torus stitching, or landscapes with plane stitching, but are there that many uses for these other stitch types?

But really, the value in these other stitch types isn’t in their obvious uses.  It’s in the ability to take advantage of these open edges to do things that you might not at first think of.  Take, for example, this collar from a tuxedo set that I bought:

The tuxedo that this came with was in all other respects fantastic.  But you can see how the front ends of the collar are all wrinkled up, like crumpled paper.  Now look at a shirt collar that I made for one of my own outfits:

The ends of my collar aren’t perfect, but they don’t have the crumpled look.  The crumpled ends are a result of the stitch type used to create it.  The first collar uses the default sphere stitching.  My collar uses cylinder stitching.  Let me show you.

To make a collar in Blender, I often start out with a cylinder that’s been modified into a sort of flat, long shape, like the image on the left.

In order to make a shirt collar from this, we need to curve it in two directions.  First, to make the arch of the collar, then to curve it around the neck.  These two curves make collars a particularly interesting challenge for a sculptor.

So lets think about stitch types.  Default stitching is Sphere stitching, which forces the ends to pinched to a single point, so lets do that to the ends of the mesh.

Now lets create the arch of the collar.  Switch to the side view, looking at the new stitched ends.  Select all of your vertices (tap A) and place the 3D Cursor (that circle thing with the cross-hairs) somewhere below the mesh (place it by left-clicking inside the 3D window.)

Now press Shift-W to Warp the mesh around the 3D Cursor.

You can already see a problem.  Because all of the end vertices come to a single point, instead of a nice arch the ends look something like the image above.

We could try using a few edge loops to push around the edges and force the ends into arch, like the image on the left.  That’s what the creator of that tuxedo set did and that’s where the crumpled edges on that first collar came from, so it ends up looking kinda ugly, not to mention the wasted edge loops.

So what can cylinder stitching do for us?  We may not want the ends of the collars to pinch, but we also don’t want them open, showing off the invisible inside.

I’ve already told you that we can force a cylinder’s ends closed.  For example, we could manually pinch them off, like sphere stitching, but that doesn’t do us much good.  But what if we close off a cylinder in a way that we COULDN’T do with sphere stitching?

Here, instead of pinching the ends off to a point, we only pinch them in one direction, creating a seam – a line of vertices.  This still effectively closes off the ends, but in a much different way than what we could get with sphere stitching.  Look what happens when we curve the mesh.

Now we have a much nicer, clean edge to work with.  If we bake this sculptie and import it into Second Life, if we select Cylinder stitching on the new sculptie, we will also get this line seam.

Aside from collars, this sort of  straight-line edge can also help with texturing.  Look at these two beveled cubes.  The one on the left has default sphere-type stitching.  The one on the right was built to use cylinder stitching.  This makes for a much nicer texture layout.

If you aren’t convinced yet at the power of different stitch types, let me show you a few examples.  I won’t tell you exactly how they’re done or why I used the stitch type that I did.  Instead, look at them and try to figure it out for yourself. As always, I’m not an all-knowing expert.  You may see a better way to do things than what I’ve done, but this may give you some ideas anyway.

Stitching Examples:

Think outside the box.  There are tons of ways to use stitch type to your advantage, to create shapes that you normally couldn’t create, or to clean up a mesh that has nasty ends or texturing issues.  If you do something particularly neat, you might consider showing it off in the new forums.

Posted by Murgy at 4:22 pm Tagged with: , , , ,

Photography in Second Life

Blog, Show and Tell 6 Responses »
Mar 252010

This week, for the first time, I decided to try doing some photography tricks in Second Life.  I’ve done SOME photography before, of course, but it’s mostly been with default lightning and maybe a few local lights.  However, I found a few photos on Flickr featuring one of my outfits that got me thinking. (Here’s a link.)

I think I’ll still use default settings for my vendor images, so people see exactly what they’re getting, but being able to show off my work in a more romantic atmosphere intrigued me, so I tried to do some of my own:

This was the first photo I did, of the same character as the photos on Flikr.  I was using the Emerald Viewer since it has more windlight settings.  I took a few photos with some of those settings, but to get this photo, I actually created my own windlight settings to wash out the background and lose some of the edges on her arm (which is fun).

I showed it to a few people, and a good number of them had to look at it twice to realize that it was my avatar and not the official game model.  I thought that was a pretty good compliment.

So anyway, I decided to try it out with a few of my other avatars and make some promo posters to set up in my store.

The only thing I did in Photoshop to any of these was add the logo.  Everthing else was done entirely with Second Life’s windlight and anti-aliasing.

Of course, that means the image with the three Cloud Strifes was done with the help of a couple friends in someone else’s back yard.  <_< But after I finished and uploaded all of the promos to show them off, one of those friends was so impressed by the photography that he decided to buy two of the avatars.

I’ve also set the images up in my store along with a cleaner vendor layout, and my sales SEEM to have increased, but it’s hard to tell since it’s only been a few days, and you might attribute the increased sales as a result of the store redesign and not solely the photos.

But don’t underestimate the power of good photography!  There’s no better way to market your products than by having nice, clear images of your work.

Posted by Murgy at 11:28 am Tagged with: , , ,

Add Alpha Protection to Sculpt Maps

Mesh, MV-SL-Tutorials, Tutorials 23 Responses »
Mar 252010

In this tutorial, you will learn how to add an alpha channel to your sculpt map to protect it from theft by screenshot and how to add a watermark to the alpha channel to let people easily tell that you made it.

A Thief!  A Thief!

Many people don’t like to include modify permissions on their merchandise to protect themselves against theft, however, there is a way to protect your sculpties from theft and STILL include modify permissions.

The easiest way to steal an object’s sculpt map is the screenshot method. The thief opens up the edit window, clicks on the sculpt map, and then takes a screenshot. He’s then free to crop the sculpt map from the screenshot and re-upload it into Second Life.

However, there’s a cure.

The Theory

Any builders will probably be familiar with Alpha Channels in Second Life. If you’ve ever seen a wall texture with window cut out of the middle, this is done with an Alpha Channel. Second Life textures can use alpha channels to add transparency to an image – but the transparent parts can still retain their RGB values! So in theory, you can create a completely transparent sculpt map that still has the RBG data necessary to form your sculptie.

Only in theory?

Well … it really depends on your image editing software and the file format you choose to save in. In my experience, only Photoshop and GIMP can do EXACTLY this. Other applications can get close enough, though.

Application-Specific Guides

After trying to help my sister reproduce alpha channels in Paint Shop Pro and Gimp, I’ve come to the conclusion that every image editor does this so differently that I need to create a guide for each one.

Photoshop
Photoshop Elements
PaintShop Pro
The GIMP

Watermarking

You’ve probably seen sculpt maps that have a logo or other watermark cut into the map image.  I’ll show you at least one method to do this in each application.  To make this process easier, I have a 64 x 64 black and white version of my logo (without the text) that I use specifically to watermark sculpt maps.  I’d recommend that you make one for yourself, as you can use this directly as an alpha channel, or to select an area to cut out of layer.


Alpha in Photoshop

To add alpha protection to your sculpt map in Photoshop, you have to use either the TGA or PNG file formats. How you add the protection depends on which file format you decide to use.

TGA Format

The TGA format in Photoshop is the most direct and (in my opinion) easiest method for adding an alpha channel to a sculpt map.

All we have to do is go into the channels menu (shown left) and hit the “New Channel” button on the bottom of the menu. (It looks exactly like the New Layer button in the layers menu.)

By default, Photoshop will make a solid black alpha channel.  This will make your image completely transparent, which is fine.  I, however, chose to paste a black and white version of my logo into the channel so it will show up on the sculpt map when I upload it to SL.

Now save the file as TGA. Photoshop will bring up a dialog, asking you a few things. Just make sure that it’s set to 32bit. Nothing else matters. Save and upload into Second Life.

PNG Format

As much as I prefer TGA alpha channels, there are people who swear by PNG format because.. well, you can see the transparency directly on the image, rather than having to interpret the alpha channel.

But NOTE to png users. In order to make the file size smaller, Photoshop does NOT save RGB values for completely transparent pixels in a PNG image. So if you use PNG, all of your pixels have to be at least slightly visible.

In the Layers menu, make the background layer into a normal layer. This can be done by double-clicking the background and hitting “OK” on the dialog that comes up.

Now change the opacity of the layer to 1% or higher. This will still keep your sculpt map from being stolen while forcing Photoshop to save the RGB information to the sculpt map image.

In order to get my logo on this one, I created a duplicate of the sculpt map layer, turned the opacity up to 100%, then cut my logo out of that top layer.  Then hit CTRL-E to merge the two layers

Save as PNG with no interlace and upload to Second Life.

Alpha in Photoshop Elements

To add alpha protection to your sculpt map in Photoshop Elements, you have to use the PNG file format.

In the Layers menu, make the background layer into a normal layer. This can be done by double-clicking the background and hitting “OK” on the dialog that comes up.

In order to make the file size smaller, Photoshop does not save RGB values for completely transparent pixels in a PNG image. In order to retain the RGB data, all ot the pixels need to be at least slightly visible.

So change the opacity of the layer to about 1% – NOT 0%. This will still keep your sculpt map from being stolen while forcing Photoshop to save the RGB information to the sculpt map image.

In order to add my logo watermark, I created a duplicate of the sculpt map layer, turned the opacity up to 100%, then cut my logo out of that top layer.  Then hit CTRL-E to merge the two layers.

Save as PNG with no interlace and upload to Second Life.

Alpha in PaintShop Pro

To add alpha protection to your sculpt map in Paint Shop Pro, you can use either PNG or TGA. How you do this is dependant on which file format you choose.

PNG Format

Open your sculpt map, then find the Layers palette on the right. Near the top, there’s an opacity slider for your background layer. PhotoShop will not save the RBG data for completely transparent pixels, so slide the opacity down to 2 (NOT 0!). (When you do this, your background layer will be changed to “Raster 1″ or something similar.)

You can leave the file as is now, or you can add a watermark. Duplicate the sculptmap layer, switch it to 100% opacity and cut out your logo or text.

Now re-save your sculpt map in PNG format. Upload into Second Life.

TGA Format

Typically, in Photoshop, I like working with TGA alpha channels, just because you can retain all the color information in your image, even when pixels are completely transparent. The problem is that, in PSP, I have yet to find an easy way of viewing the alpha channel once one has been created, which makes things frustrating.

However, if you’d still like to use the TGA file format, here’s how.

Open your sculpt map. In order for this method to work, you need to select at least one pixel in your image. Do this however you want. The area you select will be visible in SL, so don’t select everything.  A neat idea would be to select an area shaped like your logo.

Next, go to the top menu and click on Selections > Load/Save Selection > Save Selection to Alpha Channel. PSP will give you a dialog, but the default settings should be fine. Hit Save.

Now go to File > Save As and save the sculpt map in TrueVision Targe (TGA) format. You may get a warning about only saving one alpha channel. Click Okay.

Now upload the sculpt map into Second Life. Part of the sculpt map will still be visible (the area you selected), but it won’t be enough information for anyone to steal your sculpt by the screenshot method.

Alpha in The GIMP

To add alpha protection to your sculpt map in GIMP, you can use the TGA or PNG formats.  Both formats work nearly the same.

PNG and TGA Formats

Open you sculpt map in Gimp, then open the Layers and Channels dialogs by going to the image menu and selecting Windows > Dockable Dialogs > Layers and Windows > Dockable Dialogs > Channels.

Now select Layer > Mask > Add Layer Mask.  You’ll get a dialog that asks what you want the layer mask to look like.  For now, tell it to give you a completely black mask.  Hit Add.  Now you’re layers dialog will look something like the image on the left

This new mask is completely black, which will make our sculpt map completely transparent.  If you’d like, you can use this mask as-is, but I’ll run you through an optional step to add a watermark to the sculpt map.

Open up your logo or watermark file, select it (CTRL-A) and copy it (CTRL-C).  Now in your layers dialog select the layer mask (NOT the layer itself!) and paste your logo (CTRL-V).

At this point, you will see the watermark on the sculpt map in the image window, but the selection will still be ‘floating’ in the layer dialog.

Right-click on this floating selection and select “Anchor Layer”.  This will de-float the selection, and you should see your watermark as the layer’s mask.

Finally, right click the layer mask and select “Apply Layer Mask.”  Your layer mask will disappear from the layer dialog, and be added as a fourth channel called Alpha, which you will see in the channels dialog.

Now you’re ready to save your sculpt map as either a TGA or a PNG file.  Oddly enough, this is the only step that’s different for the two file types.

For TGA files, you only have to save the image. It will bring up a small dialog, but it doesn’t matter whether or not you use RLE compression, as SL will re-compress the image anyway.

For PNG files, you’ll be presented with a larger dialog.  There are two options that you should pay attention to.

Find “Save Background Color” and un-check it.

Find “Save color values from transparent pixels.”  This is usually checked by default, but just make sure that it is.

The rest of the default values should work fine.  Press Save.

You’re finished! Upload your protected sculpt map into Second Life.

Posted by Murgy at 10:32 am Tagged with: , , , ,

Why I don't take commissions in Second Life.

Blog, Business 14 Responses »
Mar 232010

Only months after I first started building in SL, I got my first request for custom work.  Someone wanted uniforms for a military in their roleplay group.  They would pay me L$3000, and in return I would give them a full-permission copy to distribute while I would never sell the uniform to anyone else. Call me naive, eager to please, or just easily impressed by a number as ‘large’ as 3000.  Whatever the case, I took the job.

This was my first experience with working for peanuts.

After about a month’s worth of building with a hawk watching over my shoulder, I finished and vowed never to do that again.  But then someone else told me they would pay L$3000 for a custom avatar.  They still didn’t want me to resell, but they didn’t want full permissions.  For some reason, this seemed like a much better deal, even though the job took me just as long to finish.

A long story short, the last two custom commissions that I took were over two years ago.  The client paid $75 US for each.  After that I have refused to take on any more commissions in Second Life.  Why?

Because $75 US for a full, custom outfit is still peanuts.

Doing the Math

If I’m working at a good pace, it will take me a week to sculpt up the pieces for a full outfit and fit them, and then another week to texture everything.  This is if I’m working roughly 12-hour days, 5 to 6 days a week.  Different outfits take different time-spans, but for the sake of this post, lets say that on average, I work about 120 hours on a single outfit.  (This is probably an underestimate.)

Minimum wage in the United States is currently $7.25.

So if I was to charge minimum wage to create a custom full outfit, I would have to charge over $800 US.

Now the catch is, that’s MINIMUM wage.  No one who does commission work charges minimum wage.  They charge more.  An illustrator might get paid $500 US for a single magazine spot that might have taken him about 10 hours to do.  That’s $50 an hour.  And what’s more?  They keep the copyright for the image.  They’re only selling the license to use it, and if someone else comes by and says “Hey, we’ll pay you $600 if we can use that illustration you did,” the artist can sell the license again!

The reason they charge as much as they do?  Because they HAVE to in order to survive.  They aren’t creating art for pay all the time.  They also have to promote their work, talk to clients, do paperwork, PLUS they’re self-employed which means they have to pay a larger percentage of their income on taxes than people who are employed by a company.

Translating to Second Life

I’m not saying that Second Life builders should charge $500 to create something for someone while retaining the right to resell.  That’s silly.  The reason Illustrators do it is they may only sell the license one or two times per illustration.

But the idea is still this: Whether it’s Second Life or real life, the talent and the time is still the same.  I still have to take time to promote my store, to talk to customers, to make updates, to write up these tutorials and so much more.  And I’m still self-employed, which means a nice chunk of my income goes to taxes.  Then on top of that there’s paying for the sim, a premium SL account, mall spaces, etc.

The only thing that’s different between RL business and SL business is the economy.  Second Life is a micro-economy.  A thousand Linden dollars is less than $4 US in the Exchange.  On the flip-side, $1000 US is about L$259000. To expect someone to pay $1000 US for a custom outfit is unreasonable from a Second Life perspective, but to work for any less than that is unreasonable from a real life perspective.

So my solution is to simply not accept custom commissions.

Statistics Specific to Me

In the first month of sales, my latest avatar sold 86 times at my top two in-world locations, bringing in L$94600 (about $365 US). (Update: March and April sales were both over L$100,000 for this avatar.)  While the sales per month will probably decline eventually, she will still sell.  Last month, the other four avatars in my ‘top sellers’ brought in about L$15-20,000 ($58-78 US) a piece, and they are fairly consistent from month to month.

I don’t post this information to brag.  I’m sure there are plenty of other people on SL who make the same sort of money or more, and while I consider myself skilled, I don’t think I’m that special.  I only give you this information to bring home the point that on Second Life it makes more financial sense for a builder to spend their time working on things they can resell than in doing custom commissions.

This is why I do not take them.  No matter how sweet a person you are or how awesome your design may be, I CANNOT take on custom commissions and still survive as a business person in Second Life.

Posted by Murgy at 5:04 pm Tagged with: , , ,

Oblong Tessellation

Mesh, MV-SL-Tutorials, Tutorials No Responses »
Mar 222010

In this tutorial you will learn how to use Oblong Tessellation to get better results with long, skinny sculpts like pipes and chair frames. I use Oblong Tessellation for many other things too, so it’s a useful tool to add to your own knowledge.

The Long and Short of It

A lot of you probably looked at the term “Oblong Tessellation” and went cross-eyed.  Don’t worry. I did too.

But after looking into it, I figured out that it’s just a freakishly complex name for a pretty simple concept.  All we’re doing is rearranging the sculptie’s vertices so that instead of a perfect square 32×32 grid, we have a rectangular grid at 16×64, or 8×128.

Above, you can see the difference between a normal sculpt map and one that uses oblong tessellation.

Why is this useful? Let me break it down for you.

The Pipe Problem

Lets say you want to make a sculptie pipe to import into Second Life. You want this pipe to be long, skinny, and as windy as possible. You decide to use three edge loops per bend to keep the pipe looking nice.

Using the default 32×32 mesh, you come up with something like the image on the left. You wind up with nine or ten bends, which is okay, but not as bendy as you’d like. (Note that if you had accounted for any amount of LoD, you’d have even less bends then that!)
Now take a look at the cross section of this pipe and you’ll begin to see the problem.

There are 32 points on every edge loop, which is a problem in more than one way.

First of all, you don’t need 32 vertices to make something that skinny look round. These are wasted vertices.

Second, sculpties start doing weird things when you have a lot of vertices in a small area. The more points you have in a small area, the more chance you have for jagged edges when you import that sculpt into Second Life.

So. What do we do? We make an oblong sculptie! This is pretty easy to do. When you bring up the dialogue to create a sculptie, by default it shows 8 x 8 faces with 2 levels of multires. Change this to 4 x 16. When you enter the number for Y, initially, it will turn black and the Build button will be greyed out. Usually this just means the dialog wants you to press Enter so it can recalculate your sculpt mesh.

There are a lot of different sizes that you can make your sculptie. For a complete list, look here. Sizes are listed as (face)x(face)x(multirez). However it doesn’t seem like Second Life can handle all of these sizes correctly. The only sizes that I’ve gotten to work (at least with with anything practical) are 8×8(x2) and 4×16(x2), and 4×64(x1).

Look at the cross section of this new sculptie.

Now each edgeloop has half the number of vertices, which is still plenty to make it look round. We aren’t wasting nearly as many points, and we won’t have so many problems with edges becoming choppy.

What’s more is, those points we took from the diameter of our edge loops now go into making the length of the pipe. We can add even more bends. (Or we can work with multires so our pipe doesn’t loose it’s shape at a distance.)

Look at the difference between our original pipe and the oblong pipe. We have a lot more to work with. This doesn’t just apply to pipes. It’ll work for anything that has a long, skinny shape, like the frame of a dining chair, or scaffolding for a building, or a streetlamp, or a pencil twisted in the shape of a heart!

Baking an Oblong Sculptie

Domino’s new primstar scripts automatically assigns your mesh an image sized based on the faces and and subdivision levels that you started with.

So if you started with a mesh with 8 x 8 faces and 2 subdivision levels, it will assign a 64 x 64 image.

If you start with a 4 x 16 mesh and 2 levels of subdivision, it will assign a 32 x 128 image.

In previous versions of my starter tutorials, I instructed people to start without subdivision levels (no multires) because I felt it was easier ( and I STILL feel it’s easier) to start defining a mesh with less vertices.

However, if you start with an 8×8 mesh and no subdivision, your mesh will be assigned a 16×16 image, which isn’t what you want. So now it’s better to start with the 2 levels of subdivision and then manually delete the higher levels if you wish to start with a simpler mesh.

Tips, Tricks, and Notes

Oblong Tesselation is still rather new and while I use it all the time now, I can’t, for the moment, think of any tips specifically related to it.

But as a note, there is some functionality of oblong tessellation that’s still being developed. Particularly the ability to use LESS vertices than the current 1024, which would be useful for certain simple geometric shapes.

Posted by Murgy at 3:01 pm Tagged with: , , , ,

The Sculpt Blender Mission

Blog 1 Response »
Mar 212010


The basic mission of this site is, of course, to help people learn how to make sculpted prims for Second Life and other SL-like grids.  But more than that, I want to inspire people to push themselves, to expand their knowledge and experience beyond the instructions given on this site.

Don’t just read the tutorials.  And don’t just follow everything I do step-by-step.  That’s not the best way to read these tutorials or ANY tutorial.  If I could give any advice to help people get the most out of this site, it would be this:

First: The best students are those who don’t quite believe their teachers.  I’m not perfect.  I’ve made mistakes in previous versions of my tutorials, and I may STILL make mistakes on the current ones.  If you think you see a better way to do something, TRY IT.

Second: Use reference and gather inspiration.  I am not saying that you should copy things, but even the best artists will look at the interesting shapes of trees before drawing trees, or look for the essential qualities of the texture of a pear.  Did you know that zipper teeth have different shapes depending on the material they’re made from?  What’s the difference between the weave of the fabric on your shirt and on the fabric on your blue jeans?  What does the leather of your shoe look like up close?  How does it look far away?  Do you know off the top of your head?  Did you think to look?

Third: You have not reached your full potential.  You never will.  I never will.  But we can get closer to it if we work diligently at improving our skills. The joy that an artist has in his or her work has less to do with the finished product and more to do with the process.  While the finished product does give a sense of fulfillment, the real joy comes from the doing.  We are constantly learning, constantly exploring our own style and potential.  Perfection is an ever-elusive goal, and even if, by some miracle, we were to achieve it, I believe any artist would soon abandon it to look for a new form of perfection, for there are many.

Fourth: Measure yourself against those who are better than you.  This doesn’t mean you should belittle yourself for not being ‘good enough,’ but you gain nothing by praising yourself for being better than someone with less skill.  Instead, look to those who are better and praise yourself when you reach the next level, then pick a new target and get back to work.

Fifth: There are limitations with sculpties and Second Life.  Certain things cannot be done.  But every limitation has a work-around.  The work-around may not be perfect, and you may not find the best solution the first time around.  If necessity is the mother of invention, then limitation is its father.

Sixth: People are doing new things with sculpties every day.  I don’t know everything.  You may know even less, but that doesn’t mean that you won’t learn something that I don’t know yet.  There are endless possibilities, endless opportunities, but the only way you’ll have a chance at them is to A) actively do things that will make those opportunities more likely (ei: experiment) and B) keep your eyes open for things that you didn’t see before.

Seventh:  Be professional.  There will be times where you get some harsh, and even rude criticism.  There will be people that you disagree with.  Things will happen which seem unfair.  But don’t be rude back,  don’t send nasty notecards and IMs, and don’t gripe.  To quote a very wise man, “There is no situation in life so bad that complaining about it won’t make it worse.”

Am I sounding preachy yet?  I apologize.  But really, the key to becoming an amazing sculpty artist is not just a matter of gaining skill.  It’s about changing your entire mindset and becoming a professional, creative, and inventive craftsman.

Posted by Murgy at 8:43 pm Tagged with: , ,

Multi-Sculptie Builds

Mesh, MV-SL-Tutorials, Tutorials 42 Responses »
Mar 212010

In this tutorial you’ll learn how to make objects with more than one sculptie in Blender, and import all of it into Second Life, plus how to make duplicate sculpties in your blender file.

E Pluribus Unum

Sometimes it’s necessary to build an object with more than one sculptie. A knee-high boot, for instance, may need to be attached to more than one bone on the SL skeleton, or an object may have clearly different pieces like a belt and a buckle or a sword with a sheath, or a shape may simply be too complex to do easily with one sculptie.

You can model all of the sculpties you need in the same .blend file to be sure that the two sculpties fit together, and to do useful texture tricks, like having the sculpties cast shadows on each other. (See this tutorial)

Primstar Scripts

Domino’s new Primstar scripts actually include the ability to export multiple sculpties with a script that will let you recreate a multi sculpt object in Second Life.

Once you have things finished the way you want in Blender, bake the sculpt maps for all the sculpties you want to export. Next, select all the sculpt meshes in Object Mode, making sure the root prim is highlighted in bright pink.

Press Ctrl-P and select “Make Parent”. Double check that the other meshes are parented by selecting just the root object and moving it around. If the other objects follow, you’ve got it.

With that root object selected, go to the top menu and select File > Export > Second Life LSL (to dir). Browse to a folder (preferably an empty one) and hit ‘export’. This should save all of your sculpt maps and ONE plain text file with the extension .lsl. Open this lsl file with a program like Notepad, select all the text and copy it.

In world, rez a plain cube on the floor. Upload all of the sculpt maps and add them to the contents of your box. Next, create a new script inside the box, then double-click the new script to edit it. Delete the default script and replace it with the text you copied from the .lsl file.

Hit Save, and after a few seconds, the script will ask you to create a prim, name it “Primstar” and put it into the box. Do that. Then the script will ask you for linking permissions. Once you give the permissions, the script will start recreating your object in world, ending by linking everything together.


Duplicating a Sculptie

If you want to make a single sculptie that will be used on multiple parts of your build, go into Object mode and press Alt-D. And move the new object to where you want it.

This will create a new object, but the mesh for both will remain identical. If you edit the mesh in Edit Mode, both objects with change. If you scale/rotate/move the object in Object Mode, it will only effect the one object.

If the shape you need for a new sculpt mesh is similar to a mesh you already have, but not identical, go to Object Mode and press SHIFT-D instead. This will create a copy, but both the object and the mesh will be separate, so you can edit the new one without effecting the old one.

Currently, the Primstar scripts don’t seem to understand exporting objects with duplicate sculpts. I tried exporting a skull that used a lot of duplicate sculpts for the teeth, and that broke the lsl script pretty bad. xD So keep that in mind if you’re planning on using it.

Adding a Mesh from an Older File

If you have a sculptie from a previous file that you’d like to add/edit in your current one, you can ‘append’ the object.

You may want to save your current file now, in case of error. Now we’ll be using a function in Blender that lets you browse inside another .blend file and select a part to add to your current file. Go to File > Append or Link.

From here, you may actually start inside your current .blend file, which is useless because Blender doesn’t let you append anything from inside your current file. (Can someone explain to me why Blender does this?) Hit “..” until you see the contents of your save directory, then find the .blend file that contains the mesh you want to append and click it, then click “Object”. From here you’ll see a list of the objects in that file. Hopefully you’ve renamed your sculptie objects so that you can easily identify them. Select the one you want, and click “Load Library.”

If you haven’t been doing it already, it’s good practice to rename your objects in Blender

This makes browsing with the Append feature easier, and also lets Primstar name your sculpt maps or you before you export them to your hard drive.

Posted by Murgy at 6:03 pm Tagged with: , , , ,

Make One Sculptie Look Like Two... or Three... or Four

Mesh, MV-SL-Tutorials, Tutorials 8 Responses »
Mar 212010

In this tutorial, you’ll learn how to make a single sculptie look like more than one object.

Making the Cut

If you look at the image here, the cushions on this chair are both the same sculpted prim. They are connected by a tiny, invisible line of points. I’ll be showing you how to do just that. Before you read this tutorial, it’s recommended that you go through the Precision Sculptie tutorial.

The method was developed by Aminom Marvin.

The Long and Short of It
(Or… just short)

Okay. You want to know how to do this? I warn you. You will gawk at the simplicity.

Select one loop of vertices and scale it to 0. (You can scale to zero easily by tapping S, then the number 0.)

Then select the loop just above or below and scale it to 0 as well. Be sure you deselect the previous loop. (Did you know that you can select a loop in Blender by holding ALT and right-clicking on one of the edges in the loop?)

Congratulations! You just made a fractional sculptie! If you bake this and import it into Second Life, it will look like two separate objects. Maybe

Maybe? Yes. The pole may still show up. It will be thin, but it will be there, until you snap the vertices to the Precision Grid!

The Precision WHAT?

If you have no idea what I’m talking about, you need to read through the Precision Sculptie tutorial. If you have read it, you might want to run through it again real quick, cause I’m not going to repeat much here.

Just remember that you need to set the grid to .01, scale the object to 2.55 x 2.55 x 2.55, line it up to the grid, then snap your vertices to the grid. After you’ve done this, you can bake your sculpt map and import it into Second Life and you should have completely invisible poles.

Tricks, Tips, and Notes

For simplicity’s sake I’m going to be referring to the separate sections of a fractioned sculptie as “pieces.” So in the first example in this tutorial, the sculptie would be separated into the top piece and the bottom piece.

Trick: Half Poles

If the one-point poles are taking away too many points for you, sometimes you can get away with using what I call ‘half poles.’ This only works if an end of one of the pieces will end up inside of another piece – hidden. Like…. THIS:


A brief summary of what’s going on here. I only pinched off a single loop, instead of two, then cap off the piece that will have the visible end. Then I resized the other piece so that the end would fit inside the capped piece (reduces clipping and other uglification problems). Then I rotated the smaller piece and repositioned it so that the connected end is now inside the larger piece. All the crap in between the two ends is inside the larger piece. No one’s going to see it, unless they’re trying to figure out how you made your awesome sculptie.

Tip: Don’t do it when you don’t need to.

I’ve seen a few people use Fractional Prim Modeling in cases when it’s really not necessary. Like… if you’re making a 1-prim sculptie hamburger, you probably don’t need to completely separate the patty from the buns. You’d just end up wasting vertices.

Often times you can get better results by using other methods to visually divide a sculptie. Be smart about it.

Posted by Murgy at 3:42 pm Tagged with: , , , , ,

Creating and Using Shadow Maps

MV-SL-Tutorials, Texturing, Tutorials 19 Responses »
Mar 202010

In this tutorial you will learn how to create a shadow map on your sculpties that you can use to create high-quality textures for your sculpts.

Texturing with Shadow Maps

For some sculpties, slapping on a tileable texture from your inventory might work well enough.

Often, however, it looks better if you create a texture specifically for your sculptie. Sometimes this is even necessary to get the look that you want. The trouble is, how do you make a texture that fits your sculptie exactly?

I’ve often seen people use a colored and numbered grid to map out the general location of certain parts of a sculptie, then match it to the same grid in 2D format. While this method has its place, it can get pretty tedious.

There are features in Blender that will help us make textures for our sculpties relatively quickly. In this tutorial we’re going to focus on baking ambient shadows, which is probably the fastest and easiest to understand method available in Blender.

In this tutorial, I ask that you have your screen split in half and one half switched to the UV/Image Editor.

Ambient Occlusion

Before we begin, I want to change the draw type in the 3D View to Textured. Find the small menu to the right of the Mode menu (marked in red – click the image to enlarge) and switch the draw type to Textured. If your sculptie is currently assigned a UV texture (such as a sculpt map), you’ll see that texture placed onto your mesh in the 3D View.

If you’ve ever worked with other Blender sculptie templates, you may already know how to bake textures onto an image. However there are other types of images we can bake. The type we’re going to bake now is Ambient Occlusion – or global shadows.

First we want to assign our mesh to a new texture. If you have multires on your mesh, you need to switch to Level 1 or Apply Multires before you change textures. Then go into edit mode and select All, by tapping A until all the vertices are yellow and the faces pink. Then in the UV/Image Editor, go to the menu Image > New. Make a new image that’s 256 x 256 or 512 x 512. Hit OK. (If you switched to Multires level 1, you can now switch back to level 3.)

Now go to the Scene > Render Buttons (marked in green – click the image to enlarge) and then find the Bake tab (blue) and change the bake type to “Ambient Occlusion” (yellow) and hit Bake. Wait a few moments for Blender to bake shadows onto your image. Save the image as something meaningful.

Usually this shadow map gives you enough ‘landmarks’ on the texture to be able to paint a texture that exactly fits your sculptie. Just use your favorite image editing software.

If you get black lines running through your shadow map, like the image above, this is something that happens in Blender sometimes, especially if there are faces on your sculpt that are twisted. Either paint these out, or blur them, or find some other means to get rid of them in your image editing software.

Previewing Your Texture

Testing your texture before uploading is incredibly easy. Simply save your new texture right over the file you saved from Blender. Then in Blender, reload the texture file by selecting Image > Reload in the UV/Image Editor.

Your new texture will now be wrapped around your mesh.  If something’s wrong, but you’re not sure where it is on the image, you can select the faces on your mesh and it will highlight them in the UV/Image Editor.

Another Texture

Maybe you’d rather keep the original shadow map or maybe you have multiple texture that you want to preview, like if you’re doing multiple recolors.  You save these textures separately and then open them in Blender to preview on your mesh.  Go to Image > Open. Find the texture you want and hit “Open Image.”

Then in Edit Mode swith to Multires level 1, select all your vertices, and find the drop-down menu next to the UVs Menu (marked in yellow). Click the small button with the arrows and select your new image. From this menu, you can also switch back to your old image, or to any image currently opened in Blender.

Multi-Sculpt Bake

If you have more than one sculpt mesh in a single .blend file (see how here) then each mesh may effect the shadow baking of the others.

If you look at the image to the left (click to enlarge) you can see how the smaller mesh has created a dark shadow on the larger one.

Sometimes this is desirable, such as when you want a drop-shadow look on your group of sculpts, but if you’d rather they affect each other less or not at all, move the meshes away from each other before baking.

Note that this behavior can be useful if you need additional landmarks on your shadow map. For instance, if you want to place a logo or other decoration at a specific location on the mesh, you can add a new object to your file and place it at the desired location so ambient occlusion will bake a shadow on that spot.
Posted by Murgy at 7:10 pm Tagged with: , , ,
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