'How to remove the brush is read only in unity?

I’m pretty new at Unity, I’ve been trying to add a terrain and add texture but it says “the brush is read only” and I can’t do it. Does anyone know how to deactivate that?



Solution 1:[1]

Is it set to raise or lower terrain? Or is the opacity too low? this happened to me as well which is why i saw this post. There is no problem with regards to the "The brush is read only" i was using the brush but none came out. Then i noticed something, thanks to the lighting the ground seems to have some small bumps. Then I set the brush opacity higher and notice a change. hopefully this helps

Solution 2:[2]

For me I disabled the terrain collider, and by re-enabling it I was able to edit the terrain. It still gave me the read-only error message but I could now edit the terrain.

Solution 3:[3]

You can add a terrain texture by click "Edit Terrain Layers" and select "create a layer" option.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Nezu
Solution 2 Dharman
Solution 3 Chancey