This is only a mockup (of course there will be textures and such in the final), this is the idea for the dungeon tiles. I'm keeping it in the same style as the game board. But I'm taking an idea from advanced heroquest where rooms have a border (wall) and corridors don't. That makes it easy to know which is which. Again I repeat, this is just a mockup.
It also makes it easy to recreate the game board, but leave off the unused rooms/corridors. That way you can only make what is actually used.
How does every feel about magents? Right now on my tiles, a 2x2 tiles has 3 ports on each side. I thought about changing them to magent holes. Since you're laying down the tiles as players explore, clipping together wouldn't be the best option (unless you're wanting to build the whole board). Or make 2 versions, 1 with lock ports and 1 with magnet holes?