Quote - If you have IDL available (Poser 7 doesn't, for example) than you don't really need to use IBL. However, if you have image based light kits, you're allowed to use them. I would not go to the trouble of using GenIBL to capture your world as an image for IBL, because you have IDL - IDL does that directly - uses the light from your world.

The one case I can think of why you might still want to do it is if you have a lot of geometry located "off-camera" that you want to affect the scene. I can think, for example, of one of Stonemason's urban settings, which you might want to have reflected off a polished chrome prop.