Hi Diane I've just finished a project for work using this method. In the GS the winsows are left black ( i add a pane of glass later ) The windowframes are a lighter or darker grey than the walls ( depending on wether you like them to be proud or in relief ). The only downside to this method is that a whole wall would be one object and you can't adjust anything ( windowframes, skirtingboard etc...) Seperatly for ambiance etc... If you could tell me how to post an image in this forum, I'd be happy to. GG