There is a mesh that one of our guys took and reflected the vertices, however the normals were not properly flipped so the the faces were directed inwards. It was uploaded and inserted into a model.
That model was placed in a few different place files.
With the new mesh update (yay for materials), any and every place that contained this mesh now crashes studio as you open it before you can do anything. In studio’s last moments alive, it renders everything jacked up, although I’m sure it’s just that mesh acting weird.
The mesh:
In an attempt to try and reproduce this issue at the lowest scale possible to pinpoint the source, I discovered that no MeshPart or SpecialMesh can be set to this MeshId, as I get the error:
MeshContentProvider failed to process rbxassetid://481844531 because Error reading mesh data: unknown version