I have begun to experiment with 3d printed texture stamps to quickly texture foam sheets.
The stamps are 2 inches by 2 inches, and will tile pretty well. There are slight lines around the stamped texture due to variations in pressure. I think I might do rollers next time to fix this. In the photo I stretched the circle cobbles stamp to 2.5 inches to make Wyloch style 1.25" grid.
When I make more, I will place them here.
To use, press firmly into foam with your hand and maybe a heavy flat bottomed object if you have trouble applying enough force manually.
Print on its edge like in the STL, don't place them flat. I have to use a 5mm brim to keep them from falling over, which I remove with an exacto blade.