I know I have to be doing something basic wrong here but I can't get Gridmap to work at all.
Here's me trying to paint:
As you can see my tile shows up but when I click nothing happens. In the output window every click adds "GridMap Paint" but I don't see anything. This seems really simple which is why I feel so dumb that its not working.
I uploaded my project here (Its essentially an empty project with this gridmap and a few tiles) https://1drv.ms/u/s!AowaNamFFw4JhtFdfmNAJZATvmgn8Q?e=O2mXdh
The gridmap is called 'GroundType'. You can click it and explore the mesh library. There's no associated collisions but everything I've read seems to say collisions are optional.
Here's an example of some of the mesh library: