If I understand it correctly, the purpose of radiosity is to compensate for
light scattered by rough surfaces. Normals, as I understand don't do this
right without radiosity which is why you need to add radiosity.

Therefore if you were to use isosurfaces or heightfields to make rough
textures with a relatively low reflection level and a high maximum iteration
level, you wouldn't need to add radiosity.

Am I correct or do I have I gone wrong somewhere?

Nekar

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