I updated the file a bit, making the grooves between the fieldstone pieces a bit larger. This makes the "grid" pattern a little more visible. I also added a small hole at the bottom for a magnet.
This is a 2x2 floor tile meant to be compatible with OpenForge. Now you have one more floor design to choose from!
I made this by putting the four floor tile shapes from TheRooster's improved dungeon terrain onto devonjones' floor tiles. The four floor tiles had to be shrunk by half a millimeter in length and breadth in order to fit perfectly in the same dimensions as the OpenForge floor tile.
This thing was made with Tinkercad. Edit it online https://tinkercad.com/things/8R4eypJAzPb