Rocks n' Grass

[Omegakyogre]

When you look at the tiles individually, you can see how you had the right idea: Similar blades of grass that get darker across the tiles; The problem is that the grass starts thick at the top and thins out nearer the bottom of each tile. While that's all fine and dandy when you've only got a line of tiles, when you start stacking them on top of one another, there shows a stark line that separates each upper tiles' thick area from the lower tiles' thin area.

Vertical separations also appear, but they aren't as prevalent; one thing at a time.