Hello, Could someone tell me which board to try for help putting a floor flat on the ground in 3d. my background was all one piece in 2d land but now I want to lay the bottom part, which is the sidewalk on the 3d ground. I cut out just the ground and imported a pmb fille of it, and I think I can figure out how to do it, but my problem is that it seems to be transparent and whatever is behind it shows right through?