A small but versatile tileset of dirt, grass, and rock. 

Here’s an explanation of each tile by x-position.

1 & 3: These are the left and right borders for the tiles. Use them on all horizontal edges.
2: This is a full tile that transitions into itself and other tiles like it.
4 – 6: These tiles all transition from full to darkness. The one in the middle transitions into darkness on both sides. It’s a little hard to notice, but it makes a difference.
8 – 9: These tiles transition to other types of tiles.