oh yea, coffins have multiple variants both “open” (that you can put stuff in it and make it in game open/close, or just scatter it around showing that something got out of it, etc.).
…it’s complicated. Depends on the engine really, but Unreal can do stuff like that, but low poly terrain is frequently assembled from just ground meshes. Sculpting the terrain to look good like a grave hole would also require increasing the resolution (and IIRC there is no ‘dynamesh’, you would have to make whole chunk of terrain higher res). And it’s just way easier in my experience to just plop down a mesh like that.
Thank you!