Grass issue on Massive Terrains

My terrain size is 10000x10000 and result thats it. Grass density, strength are %100. What to do?

It’s still not good as i want with that.

The terrain splatmaps have a max size, so as you make the terrain bigger, the details necessarily must be sparser and more spread out. So instead of making one huge terrain, split it up into multiple smaller terrains.