Dennis, regarding the 'overall look', if by that you mean the image seems grainy, this could be due to the amount of 'available light' for the scene. The more lights, the crisper it should become. One thing I have noticed, especially with X6, is that ray traces of rooms with daylight entering through a window, or exterior ray traces seem to meet my 'goodness' criteria with 1/3 to 1/2 the number of ray trace passes needed for an 'interior lit' ray trace. Stated differently, you will probably need to at least double the number of ray trace passes to equal the goodness of a well lit scene.