Recently I have done a test with the pass index technique that BlenderGuru (Andrew Price) used in his last Logo tutorial. The idea is to separate objects using Pass Index instead of Layers to apply different Compositing settings.
I have created a simple scene (cube pass index=0 and sphere pass index=1), but I’m unable to make the pass index works (Blender 2.64 R51880). If I select pass index 1, I got only white.
This is my settings…