Gompel, Thanks! I use a form of chipboard that is available from most art supply stores for $1.00 a sheet that's 40" X 30". The natural color is medium tan-gray as can be seen in the picture below.
Most of the my buildings are take apart, by which I mean you can remove layers to indicate damage from minimal to heavy, with the final layer being mostly rubble. The devil is in the details. The more detail the more players are drawn into the game...
I know I have them hooked when players get down to table level and look around to see what their figures can see...
In my view the more detail the better... Will
"The three most important words when trying to make a decision are: communications, communications, communications, ...in that order" MGen BG Hollingsworth USMC (retired)