U could just export the mesh into blender then make a copy and just use boolean modifier and export it back (i reccemend it if its ur own mesh or if its a free model)
You revived a one year old post… just to propose a “solution” that does not actually solve their problem? This is Help and Feedback > Scripting Support and not building support, they want a solution that is obviously meant to work dynamically and in real-time.
A solution that OP would actually be interested in if they’re still trying to implement something like this would be the new updates Roblox is making to CSG which supports MeshParts: