[BUG]Mesh collisions with concave surfaces not exported properly (0.9.24)

[WinderTP]

Describe the bug
Mesh collisions with concave surfaces are exported without concavity, often resulting in a convex "blob" mesh collision

To Reproduce

1. Create a model with mesh collision
2. Model the mesh collision to have concave surfaces
3. export the model and implement to appear in-game

Additional context
Monolithic mesh collisions can be split into multiple meshes so this issue can be remedied somewhat currently