These are two of my terrain boards, each board is 18" x 24" and is scaled for 1"= 200 yards, so these boars represent the playing area of a 4x6 table. The contours are 6mm plywood, the foliage is woodland scenics, and the roads and rivers are acrylic mediums. I use them for polemos, blucher, volley and bayonet and assorted microarmour games.

These look really good!  Thank you for sharing, this is an excellent approach!