I imported the grass texture but when I apply it nothing happens and I can’t even make mountains.
Me too
Could you give a little more information?
Are you aware you that you have to paint the texture on yourself under the terrain script?
Check the opacity of the brush and make sure it isn’t set to zero.
Check the brush size of the paintbrush/mountain tool has a large enough brush to be visible
That’s all I can really think of off the top of my head. If you could be a little more specific, maybe you could be helped further.
How do I paint the texture?