Ok, this is a pretty big issue in my opinion, so maybe there is a technique that I am not aware of, but I tried a bunch of different things here. You will have to open the file and read the explination in the elevation view to understand this issue.
But heres a layout.
1. A building with reveals at 4'-6", 9' and 13'. (may vary)
2. In between reveals pain colors change, could but maintaining material thickness here is key.
3. Now on alternating faces checker the 2 materials.
Note: I havent even begun to add doors or windows or modify a profile. this is at a very basic stage with some basic roof condiditons.
Thanks for your help, this is a pretty complicated issue I think. Have fun.