Well, to begin with we need a glass material that will take a texture map. I'm not quite sure how to set that up yet, since I'm not sure if the map should be in the kr (reflection - doubtful) or in the kt (transmission - probably the best choice). Either way I've tried it's not working however, so I may have to get my head together with Snarly on this one ;). Architectural glass has a kd node, but so far I'm not having any luck with it either. The only thing that's worked for me so far is putting glass on the window mesh and mattetranslucent on the duplicate mesh, which of course isn't optimal.

Laurie