Compositing Rich Pixel Renderings

Once you create a rich pixel rendering and import it into combustion, you can use it in composites as a layer. This section describes Z Depth transforms, shadows, and camera matching—effects you can create without using 3D Post filters. 3D Post filters are described in Using 3D Post Filters in combustion.

The following table lists the G-Buffer channels used for Z Depth compositing, shadows, and camera matching. To use these compositing effects, make sure you save these channels when you render the rich pixel file.

Channel	Z Depth Transforms	Shadow	Camera Matching
Z	Yes	Yes	No
Material Effects	No	No	No
Object	No	No	No
UV Coordinates	No	No	No
Normal	No	Yes	Yes
Non-clamped Color	No	No	No
Coverage	No	No	Yes
Node Render ID	No	No	No
Color	No	No	No
Transparency	No	No	No
Velocity	No	No	No
Sub-pixel Weight	No	No	No