PJF: I think a combination.... you see the model was created in Amorphium Pro, imported into Bryce and textures, the light was added inside of the structure, carefully scalled to make sure that it was NOT sticking out of the top of the structure. I made sure I set the materials to "Solid When Boolian Rendering" and made sure that the setting in the materials lab were set as you had mentioned.... (Which I think BTW is the default)?? I'm still getting a little light-bleed at the roof.... so I adjusted my range in the light a little less... that seemed to fix the issue a little. Michael