Casting light from interior fixtures

…Night shots and dusk shots aren't that far off from daylight shots,…in that we want to show off the best features of the design.…Where they differ, is that in night shots or dusk shots,…we can see our interior lights, where the strong daylight in a…daylight shot, will blank out the interiors effectively, until we're inside…a space enough where it's dark enough to turn on the light.…The other difference with our night shots, is that we'll have good strong light…from our interiors, but a much lower light from a dusk sun coming in.…If we're dealing in a night shot, we way not see our interior lights at…all if we project a moon light coming in, because the moon is bounced light.…

If we turn on our interior lights,…that effectively blanks out or removes the moonlight.…So we have some choices to make there on what we see.…What I'll start with first then, is to get my interior lights in.…In this scene, I've left my mental ray materials on,…as well as my photographic exposure, global illumination, and final gather.…