I tried to make a little low poly pond and the grass surrounding it looks extremely weird.
This only happens when I join the game, or I am standing in a certain position.
Keep in mind: The mesh is only where the weird looking things are, all of the other grass is a part with a hole in the middle
Solutions: I tried raising the grass part a little bit above the mesh
What lighting technology are you using? What graphics quality are you using in-game?
You could try disabling shadows for all involved meshes that don’t need it (like the sand and the grass around it), shadow casting objects in close proximity can sometimes create some janky shadows.
You could also give the mesh precise render fidelity
It’s hard to tell exactly what might be causing that, but try these settings.
After doing a bit of research it seems to be a roblox issue. But yes changing the RenderFidelity to precise should help. You could also just use a union for the grass if you want it one part.