Thanks for responding, It might be the horizontal wall just above that, as im getting a thin black line on the left side of the file, likely coming from the vertical wall overlapping. I'm having this issue from most tiles, sorry if it wasn't clear in my original comment but I believe the tiles are misaligned with the 32x32 grid. When selecting empty spaces between tiles and placing them you can see lines on the edges that are coming from the tiles next to the empty space in the tile sheet.


