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Blender 2.5 Lighting and Rendering by Aaron W. Powell

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Indirect Lighting

Like Environment Lighting, Indirect Lighting was added with the release of Blender v2.5. This algorithm works in a similar fashion to the Environment Lighting algorithm, except that instead of taking light directly from the environment, Blender bounces light off of objects in our scene and uses the reflected light to illuminate our objects.

The following image shows the default Indirect Lighting settings:

Indirect Lighting

This is most useful when using a mesh to illuminate a scene, instead of a lamp. Unfortunately, this algorithm also still has some issues for example, it only renders a mesh as a lamp if we use the approximate algorithm and not ...

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