(Unity 2020.3.0f1) Creating new terrain in new project => terrain brushes are "read-only"

Steps to replicate:

  1. Install Unity 2020.3.0f1 (using Unity Hub)
  2. Create new project: Unity 2020.3.0f1 with “3D” template
  3. Open the new project
  4. Create new terrain (Right-click + 3D Object + Terrain)
  5. Select the new terrain
  6. Click the brush icon in the Inspector
  7. Observe that there is an info text saying “Brushes are read-only”
  8. Try and draw on the terrain
  9. Observe that the terrain isn’t changed

Not a bug. Used UI incorrectly.

There are two tabs: scene and game. You are in game. Put the [scene] tab and you will be able to draw.
(“Brushes are read-only” means non-modifiable brush. It has no effect in terms of drawing)

I am having the same issue. It was working fine, unitl I added a terrain kit. And suddenly my brushes went to read only. Thus far, noone has had a solution on any support site I have been on. It is very frustrating. If you found a fix, please let me know. Thanks so much!

Any fix yet? as you said theres been no solid solution anywhere. usint the latest lts 2020.3.3

I can confirm that, on the scene nothing draws. it also shoots errors for me. Whether an absolutely fresh project or not, same problem arises every time. https://drive.google.com/file/d/1Jka9QncMjRyRvjImSaDd0jnroZsb9zZR/view?usp=sharing the second i click the brush, read only and error.