Channel Composite is a very helpful tool for compositing 3D render passes. Often separate render passes are created representing different aspects of the scene. As in the example above, the full reflection is rendered separately from the texture, as well as an attenuation pass to control the Fresnel effect. Channel Composite is helpful in these situations because with one plug-in, specialized mattes can be created easily, rather than having complex precomps that often get convoluded.
by WalkerFXEffects Used:Channel Composite