Quote - This is amazing, really well done. Excellent work.

With so much ambient light, are grain or blotches a problem? I dont see any of it on your images, so I see you took good care of it. :-)

What about transparency on the windows? In your renders the windows appear as white. Could you have transparency on them and see the outside?

Yep, you could do transparencies if you wanted to. It would take longer for the render, but it would work. Or you could just place alpha planes outside the windows.

Quote - What about other light sources? You say that these images were produced just with ambient light. Could we put a lamp additionally in the room, for example, without spoiling the effect?

Lamps and other light sources work fine. I'm doing a totally enclosed scene right now and will post it when it gets done so you can see.

Quote - What about Poser figures in these rooms? Do they look good in this light? Namely, have you tried a Poser figure with SkinVue applied to it? Or a Poser figure rendered with the Poser shader tree?

Haven't tried Poser figures...I'm not much of a Poser guy so I don't really know. I would suppose they'd do alright....why wouldn't they?

Quote - What about caustics, like from glass or water? Do they look good in this light?

I would assume caustics need a direct light source, not just ambient. So I expect they'd work if there was a glass of water under a lamp.

Quote - Sorry, too many questions! :-) But your product did trigger my curiosity. :-)
I got curious about the SketchUp - OBJ converter. That is only necessary for the free SketchUp version, right? I ask because Vue can directly open SKP files from the pro version. Or does this converter do something else, like cleaning the mesh or something else? (SKP meshes seem a bit "chaotic" to me, in terms of topology)

You're correct, the OBJ converter is for the free version as only the Pro version can export OBJ's. I find Vue likes OBJ imports much better than SKP import, especially with Complicated components and groups. I haven't had any problems with the topology.