Hey i have a 3090 card and it says on the basic flat greenlands pack its out of memory!!!
So yes something is up here.
Just read on another post about a guy using landscapes (he didnt mention brushify) but said this was causing render que to crash.
Need to render out seperate parts for compositing so NEED render que
Is it worth sending crash log to unreal?
Sorry i couldnt help. Sounds like you know more than me. But your not alone on this issue.
Another thing i noticed is i recently completed a course on making a complex forest scene. Importing a statue in from megascans. also rocks, foliage, grass, trees, mud textures… I completed this. And it rendered out fine in Mov Rend Que???
here is other post on landscape issues