Gray square tile wall with varying heights and rough surfaces.
A close-up view of the surface of a square stone tile wall, the tiles are designed to all have slightly different heights. The tiles are gray, and the surface of each individual tile is rough. The tops of the tiles are a darker shade of gray than the sides of the tiles. The tile that is protruding out the most from the surface of the wall is in the middle of the top of the image. The rows of square tiles are extending at a diagonal angle from the bottom left side of the image to the top right side of the image. Light is shining onto the wall, causing the higher tiles to cast small faint shadows over the tiles to the right of them.