hello! I have an OBJ file that contains a vehicle.  The vehicle has multiple layers to it (left front tire, passenger door, etc), each one loading up as its own mesh.  I am starting to notice that, though the model loads correctly and looks fine, the mesh.positions are all listed as [0,0,0].  When trying to cast a ray from some arbitrary origin vector to the closest mesh, they all shoot to the world's 0,0,0 and, either miss the target completely (no hit) or hit some other mesh that's in the