IRender nXt automatically uses SketchUp transparency settings.
It includes refraction, reflection and illumination through the transparent surface.
You can edit the transparency settings with a slider-bar, change the Index of Refraction.
Daylight Portals
Daylight effect through windows.
a special transparent face placed over an exterior opening or window which causes exterior light to be processed better.
The left half image on the left has a normal (non-Daylight Portal) opening. It took hundreds of passes to resolve properly. The right half has openings marked as Daylight Portals. The lighting looked this good after just a few passes.
