Changing the texture of a certain area?

Development Rendering
1

This is probably explained in 100 different places, but how to change the texture of a certain area? Like making a mountain stone, but the rest of the map grass? My entire world is grass, cant figure out how to change it.

2

This should be what you are looking for.

3

Still nope.

So, I’ve done everything… but all it turns out to be is black.

Edit: Got it! Preview weight is important (;

4

Awesome :slight_smile:
Glad it is working now.