Yup, I'm talking abour environment maps :)

In 3dsmax u can assign an environment map for your scene, and apply a seperate HDRI to your skylight for the IBL. Also you can override the environment map for seperate objects by assigning an environment map to the objects material. I'm quite sure there's similar options or options to generate similar effects in other 3d programs.

How do glass materials work with soft shadows? I remember in B5 soft shadows and glass generated some errors unless premium render mode was turned on. Does IBL require premium mode? And how do Glass objects react to IBL if IBL is possible in normal rendering mode?

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