Mar 012010
 

Blender Basics for Second Life Sculpties

It was a grand occasion one summer day back in 1997. I was an ambitious 14-year-old who wanted to get a head start in 3D modeling. I had installed Blender 3D for the very first time on my computer, and had just opened it up. What I saw was something similar to the image on the left.

What did I do from there?
I stared at the screen for two minutes before shutting down Blender and going back to playing video games.

The moral of the story is: Blender is complex. I will not lie here. However there is GOOD NEWS for you Second Life sculptors.

The news is this:
You don’t have to learn all of Blender to make sculpties and what you need to learn is PRETTY EASY!

You should already have Blender, Python, and the Domino scripts installed. If not, back up one tutorial.

Also, in order to make life easier, you should have a full-size keyboard with numpad, and a two-button mouse (preferably with a scroll wheel). If you are using a laptop keyboard, either buy a full usb keyboard, or at least a usb numpad. If you’re using a 1-button Mac mouse, I’d recommend getting a cheap mouse from Wal-Mart or something, but you can use the typical mouse/keyboard combinations if you feel so inclined.

Blender Windows

Blender’s interface uses a rather unique window setup. I won’t get into the complex details in this tutorial, but I need to explain a few things.

When you first start up Blender, you will have three divisions, or windows (Shown here. Click to enlarge).

So how is this important to you right now? Your cursor’s location determines which division is ‘active.’ The active division will respond to all mouse and keyboard commands, so if things on your screen appear to be unresponsive, first check your cursor position.

Blender Camera Controls

The NUMPAD is your friend for camera control. If ever you don’t know which way you’re pointed, just tap 1, 3, or 7 on your numpad and it will show you the front, side, or top respectively. If you ever need to see opposite side of your sculpt, simply hold the CTRL key in combination with the numbers.

The numbers at the top of your keyboard don’t control your camera. Instead they switch between ‘layers’ in Blender. If you press one of these keys, your mesh may disappear. Don’t worry. Just press 1 at the top of your keyboard to return to layer 1.

Your mouse wheel is your other camera controller. Scrolling with the wheel predictably zooms in and out on your 3D view. Clicking and dragging with the wheel will rotate the camera around a set center point. If you hold SHIFT while clicking and dragging with the wheel, the camera will pan along the current view plane.

Remember: If your view doesn’t respond to the keypad, check your cursor position.

If you have no mouse wheel, there are alternate camera controls:
ALT+LClick/Drag — Rotate
ALT+SHIFT+LClick/Drag — Pan
ALT+CTRL+LClick/Drag — Zoom

Basic Editing in Blender

Before we get into making actual sculpts, we need to get familiar with the basic editing hotkeys. They are fairly straight-forward.

Selection:

Right now, you have three objects on your screen. A box, a camera (pyramid thing), and a light (circle-thing). To select one of these objects, Right-Click on it, and it will get a pink outline. To select more than one, SHIFT+Right-Click on each in turn. You can also SHIFT+Right-Click on a selected object to deselect it.

To toggle between selecting ALL objects on screen and NONE of the objects on screen, tap the A key.

Object Manipulation:

The hotkeys for basic object manipulation are really straight forward.

G – grabs the current selection (picks it up so you can move it)
R – rotates the current selection
S – scales the current selection

Tap one of these keys ONCE. This will only begin a rotation, scaling, or move. At this point, your manipulation is ACTIVE. Left-click to set the manipulation or Right-click to cancel it.

Also, you probably noticed that S will scale your object in all directions (every axis). If you want to scale in only ONE direction (axis), while scaling is ACTIVE, press either X, Y, or Z. These represent your X, Y, and Z axes. Also, if you press SHIFT + X, Y, or Z you can scale in all but one direction.

Blender also allows you to use the X, Y, and Z modifiers while grabbing (G) and rotating (R) your selections. Try them all out to see what they do.

Mar 012010
 

Installing what you need

There are three things that you need to install on your computer before you can make sculpties in Blender:

Blender 3d 2.49b
The Python software
The Primstar sculptie scripts

Installation is… fairly straightforward if you do it right, but unfortunately, there are two steps that are easy to mess up, and can make things very difficult, so I had to write up this short tutorial.

Go figure.

Primstar does not currently work with 64 bit versions of Blender and Python. Please download the 32 bit versions even if you have a 64 bit operating system

Installing Blender

Download Blender 3d 2.49b from here.  For now, Primstar does not work with Blender 2.5x.  The people at Machanimatrix are working on a new version of the scripts, but for now, we’ll have to stick to the older version of Blender.

Installing Blender is fairly easy. For the most part just follow the instructions. However, there is ONE thing that Windows XP users will have to change

There is a point during installation that asks you where you want to store the user data files. By default, the ‘Application Folder’ is selected. Switch this to the “Installation Directory. This will save you some hassle in a bit.

After that, just wrap up the installation as normal.

Python

Download Python 2.6.6 from here.

For the current stable version of Blender (2.49) you’ll want to download the latest 2.6 build of Python. Do NOT download 3.1 or 2.7. Install normally.

Domino’s Primstar Scripts

Download the scripts from here.

Installing the Primstar scripts is probably the most troublesome of the three. Go into your file explorer, and navigate to the Blender data directory. You’re looking for the .blender/scripts folder.

.blender is a “hidden folder.” If you can’t see it, you may need to change your settings to show hidden files and folders.

In the Windows file explorer, go to Tools > Folder Options, and in the View tab check “show hidden files and folders.

In the Mac OSX, type the following in the Terminal:
defaults write com.apple.finder AppleShowAllFiles TRUE
killall Finder

Try looking for the folder in the following directories:
Linux: ~/.blender/scripts
Mac: /Applications/blender/blender.app/Contents/MacOS/.blender/scripts/
Windows XP: c:\Program Files\Blender Foundation\Blender\.blender\scripts
Windows Vista: C:\Users\USERNAME\AppData\Roaming\Blender Foundation\Blender\.blender\scripts

Mac OS users will probably have a particularly hard time finding the correct folder, as apparently, you can’t get to it by any conventional route. Either search for the exact directory in the Finder, or else look at this video tutorial to learn how to set up Blender to use an additional user-defined scripts folder.

Once you’ve found the scripts directory, find the folder called “primstar” inside the zip file you downloaded and copy the whole folder into the blender scripts directory. If you’ve installed Domino’s scripts previously, you might have to find the old ones and delete them manually. Now you’re ready to start Blender.