This page gives some basic details about the Shadow Color Channel and how it is used in compositing.
Overview
The Shadow Color Channel is a color image that works as a reverse mask for shadows and can be used to lighten, darken or tint shadows. Shadows can be lightened in the composite by adding this pass, or darkened by subtracting this render pass from the final composite.
The Shadows channel is the product of multiplying the Raw Shadow with the Diffuse in the composite.
UI Path
||Node Editor|| > Add > Render Channels > Color Channel > Type > Shadow
Common Uses
The Shadow Color Channel is useful for changing the appearance of shadowed areas in a compositing or image editing application. Below are examples of possible uses.
Shadow Render Element
Original Beauty Composite
Contrast added to the Shadows Render Element
Underlying Compositing Equation
Raw Shadow x Diffuse = Shadow
