So, this isn't an asset per say, but a link to my blog where I detail a technique for making tiling wall sections that connect together on a square grid while hugely cutting down on the amount of art required to achieve all the required combinations. You can read the whole thing here.

Nice little technique! Although it seems like you don't need all 4 tiles to represent the vertical and horizontal tiles.

Granted, but I'm afraid that would look too repeat-y, you know?