Problem with Terrain Paint Details Tool,Problems Using Terrain Paint Detail Tool

Hi,

When I try and paint grass on my large terrain it works fine. However when I do it on a smaller terrain it produces this high density low resolution grass:

I have tried changing the Control Texture Resolution as per this answer: https://answers.unity.com/questions/488926/paint-brush-size.html

But it doesn't seem to do anything. My terrain is 20x20 and I want to paint a few pieces of grass.
Does anyone have any ideas?

Thanks for the help,Hi,

When I try and paint grass onto a large terrain it works fine. However when I draw onto a smaller size terrain with a smaller brush I get this really high density grass:

I have tried the changing the Control Texture Resolution as this answer says: https://answers.unity.com/questions/488926/paint-brush-size.html

But it didn't seem to do anything. My terrain is 20x20 and I just want to draw a few pieces of grass. Has anyone got any ideas?