Sculpt Blender Forums

Sculptie: Discuss!

1. 

   Aaack
   Member

   Hii, ok first message here.

   Im Aaack (Aaack Aardvark/Aaack.Straff inworld), and I'm quite noob in Blender, I jsut don't have the money for max or maya, (formal education there), so Blender it is.

   I love it, alas I was part of the myriad of ppl whining about the alien interface in mah time, now i find it super fast.

   So first of all THANK YOU, your tutos kick mah ass high enough to see above mah cloud of whining, allowing me to gather humbleness enough to assume I didn't know anything at all and start from scratch, thanks to that I started to do decent sculpts ^^

   And then, of course, i got ambitious, so without more preamble my question:

   I've made a railing, using a 6x64(1) oblong sculpt. Basically divided it in squares with a zero vector in the middle, if i would import it it would look like several boxes separated one from the other.

   

   Ive wasted 6 segments to create a 2.55 cubic bounding box, to preserve the aspect ratio.

   Then moved those boxes until I made mah railing.

   

   So far so gewd, no surprises here, in world there was some displaced vertexes, i had to change (I'm using the primstar scripts and blender 2.49b).

   Then I tried to generate the abient occlusion to use it later with the Gimp... owchie!!

   (sorry in advance for the thumbnail images, they are just too large and Ill be booted out for breaking the layout of the site lol)

   This is mah Ambient occlusion settings:

   

   Aaand the baking parameters:

   

   As you see the ambient occlusion map is super jagged, I've changed the settings to ray trace, 32 samples, constant jittered (and a myriad of changes more) without success.

   The map applied looks wrinkled. I get the black lines, they don't have enough surface visible to receive light, so they are black, it's ok. You would think then why are you asking this?

   Well heres the mystery part:

   Check the other thumbnails, how the model is showed. Thats exactly how is showed in SL too, however if you change the Object mode to Texture Paint mode:

   

   ZOMGWTFBBQ!!!!!11!

   Suddenly the map looks awesome!, so it's using another pipe to represent that.

   So mah question is how do I use that pipe to render the occlusion (may be + texture?) map? huh? HUH???

   For now I'm trying to circumvent this using a blur and render stupidly huge maps (2048x2048, down sampled in Gimp).

   I hope someone can cast a light over this, Nooo not a sun light, jeez, now everything looks washed out! **facepaws.

   Edit: Repost all the images, jeez I suck using imageshack...

   Posted 1 year ago #
2. 

   Murgy
   Geek Master

   I'm not really sure exactly what you're trying to show me. The last two screenshots look identical to me.

   But I CAN tell you that you're likely to have some problems trying to use any sort of real ambient occlusion texturing on a mesh that's this complicated. You've had some professional 3D training, so you probably know something about UVmapping.

   Unfortunately, for sculpties you don't get a whole lot of say about how the mesh is mapped out on your UV texture. It's always going to be on that grid, just like the sculptie map. You can repeat it one way or the other or both, but that's about it, and if you try to render occlusion, suddenly you're dealing with all of the edge loops that you pinched off and the overlapping faces so that the visible area of the mesh is only a fraction of the texture surface. So a lot of your AO ends up black.

   Consider this: That little brace you have between your pipes is taking up the same ammount of texture space as one of your large pipes. And that isn't a lot of texture space.

   For something long and skinny like this, its best to build it with the mindset that you're going to use a repeating, shaded texture on the entire thing. Just a single, repeating pipe texture. If you're planning on doing more complex texture work than that, then you'd best use more than one sculptie.

   Posted 1 year ago #

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