(New) Terrain wont accept paint texture

Unity Engine
1

I have looked at a few threads on this and none help me. I think this issue could be different.

I have an existing terrain block, that is landscaped. On this block I can not use the paint terrain tool, however I can use all the other options like erosion, raise or lower terrain, etc.

Now when I add another terrain block, everything works, without changing anything, so surely it cant be

Any ideas?

Edit: Before I posted this, I found solution, so posting for others that have the same problem:

It was one of:

  • Removing all layers, adding them back again
  • Replacing layer.
2

Yes, it was likely the alphamap (that stores where your your textures are painted) was out of sync with the Terrain. We fixed a few bugs along these lines in 2019.3. Your workaround works because by removing and re-adding all of the layers, you effectively create new alpha maps.

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