I have problem with grass. It was floating, known problem with solution here Floating Landscape Grass - World Creation - Unreal Engine Forums
After command RemoveLandscapeXYOffsets and grass.flushcache firstly nothing happens – grass was floating still, but after another command try, whole grass gone – is not visible in PiE nor in game.
This same grass mesh I have on other map and it works as expected, no issues, on this landscape firstly grass was floating, then gone.
Landscape where grass works was with my custom layers.
Landscape where grass NOT working is with procedural material AND custom layers – materials are placed correct, everything works just no grass (I think other procedural meshes will not work too). Maybe here is key, dunno.
No screenshots – just no grass