These are the files for the example in Chapter 15 on compositing. Note that the Suzanne head is on Layer 1 and the Cube is on Layer 2. This should help you in setting up your render layers.
If you followed the steps in Chapter 15, your .blend file should look something like simplecomp-end.blend. If you render (F12) this scene, it should look fine. Then when you’re in the Node Compositor, left-clicking each of the Viewer nodes will show what is on each Render Layer node.
Cool, huh?
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This setup is similar to the one in Figure 13-4. There’s an Empty producing a fairly massive wind force that’s pushing the particles towards a giant plane. That plane is configured to act as a collision object, so the particles bounce off of it and then get blown back around it by the wind. Put your mouse cursor in the 3D View and press Alt+A to watch it in action.
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This is a simple soft body simulation with a Suzanne head. Test it out by putting your mouse cursor in the 3D View and pressing Alt+A. One thing you might notice is that Suzanne’s eyes pop out of her head. This is because her mesh is not an entirely closed mesh. The eyes are actually separate islands of vertices. This means that they’ll react to physics independently of the other bits in the mesh. Not a huge ordeal for this simulation, but definitely something to keep in mind when you’re building your own.
Also note that the first time you run this simulation it might be pretty slow. However, after running through it once, Blender caches the results, so the second playback should be at nearly real time.
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This simple arrangement uses the rigid body physics in the integrated Blender game engine. To see it work, move your mouse into the 3D View and press P. The game engine will start and you’ll see the Suzanne head and the cube fall on to the plane and bounce around a bit. You can quit the game engine by pressing Esc. If you edit either of these meshes, and restart the game engine, you should see totally different results. Go ahead and play with these settings. It’s nearly addictive.
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This is a simple particle setup to emit some particles from a grid mesh. To see it in action, put your mouse cursor in the 3D View and press Alt+A.
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