Fix mesh quality upon joining game

[ItsKoiske (Vince)]

If you look up most of the posts related to meshes, you’ll see at least one person redirecting you here:

Levels of Detail for Mesh Parts

[MeshLODTree] There are a couple of known issues: The fix for both of these will be released next week. A temporary workaround is to apply a texture to the meshParts.

There’s no current fix for that and all you can do it wait for them to fix it.