grass control map

Unity Engine
1

Hello
I just wanted to clarify - I assumed that if I paint -say a red circle in the red channel and a green square in the green channel of a grass control map, then I should only see grass type 0 in the circle, grass type 1 in the square and bare terrain everywhere else. But I am getting both types of grass everywhere, including cliff faces, so is there something I’ve missed in setting up the grass script?
I have tried both black and white backgrounds in case there’s a difference.
Thanks
Boxy

2

Does the mesh you attached the grass generator script on have uv’s?

First thing to try would be to assign a material with just the control map on that very same mesh, so you can see if the control map looks as you intended it in Unity.

Also make sure you don’t use multiple materials on the mesh you attach the generator script to.

3

Yes the UV map is the same as this terrain lightmap from another post.

There is a single multi layered shader on it. I’ll try what you suggested first though.
Thanks a lot
Boxy