hi....i have a 3d vw11 model with many classes and several layers. it's a big file too - 150 MB. i'd like to render the whole model with a grey tone but still have shadows with enough contrast to compliment the shape of the model....when i render with custom renderworks, the shadows appear very flat making the model look flat too.....my custom renderworks settings are: very high, 3d recursion level is 31 (max), shadow mapped (or ray trace - they both give the same results), transparency is on, anti-alias off, nurbs on.... i tried to put two directional lights at arond 30% to try to make it look more realistic....i also added a slight roof tile texture to the surfaces, but it still looks flat.....any suggestions (that will not make the software crash)?