UE5 Landscape Mode,I can't see my Brush.

Hi @Derolor ,
I’ve been looking around and found these possible solutions:

Level reload workaround
Fairly certain it’s an engine bug introduced into 5.1. You can bypass it by opening another level/map, if you don’t have a second, make one. Open up that second map then go back and reopen the one that has the landscape that you want to paint height or textures onto. Opening and closing the engine/project won’t fix it but reloading the level you want to paint in manually while having the project open does force the brushes to appear to allow painting. You will have to do this every time though, so it’s not a fix, but a workaround.

Post Process Volume translucency
The cursor for landscape will not render in the viewport while the Post Process Volume has Translucency set to Ray Tracing. Be sure to switch it to raster while editing a landscape:

Forum post with a possible fix
There’s also a discussion about a possible fix here:

Regarding the material not showing—could you share a bit more info? Which Unreal version are you on, and how do you have it set up? I’ll see if I can help with that.