This page provides information on the Bump Normals Color Channel.
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||Node Editor|| > Add > Render Channels > Color Channel > Type > Bump Normal
The Bump Normal channel is useful for changing the appearance of lighting in a scene in a composite without the need for re-rendering. In the example below, a lighting workflow is used at a composite level to change the lighting in the scene. Note that it does not create any extra shadowing. While the Bump Normal Render Channel provides information about how lights will affect each surface, the Point Position element passes the spatial location of each pixel. When used together, it allows lights added in compositing to react to the pixels as if they were on the surface of the model.
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