Depth Passes for 3D Compositions
Z-depth can now be extracted by the 3D channel extract effects from a nested composition that contains 3D layers.
This and other depth related effects can be found in the 3D channel effect option. These can be used to apply 3D depth effects to the composition layer, such as a depth of field blur, or to generate a matte for depth compositing or color correction.
Depth passes can be generated by the Classic 3D or Cinema 4D Renderer for 3D layers. A depth pass lets you combine objects behind others or apply effects that change with distance, such as depth of field.