Here are some shots of them in action during the game:
Each tile is made of cardboard, with smaller cardboard strips along the sides for walls. They’re spray painted black, then painted with ‘Grey Stone’ texture paint to give them that rough, dungeon stone look.
The edges are then painted with a water/black acrylic wash to give them some light definition. Finally, black hatches are added with Sharpie to give them a grid overlay.
For what amounted to about $20 and a few hours of work, I couldn’t be happier with these. They were a hit with my players.
They do take up a lot more space than expected though.