Painting on the terrain.

I want to paint on my terrain using the brush, but everytime i try it covers the entire terrain instead. How do i make it stop doing that??

Thanks :)

when you first add a texture to paint it fills the hole terrain.... but when you add a 2nd one you can then select the seconds texture and pant on the parts of the terrain that you want.

if this does not happen then its a bug....

Use a smaller brush size. If that is not working then it could be a bug. Or your terrain is tiny.