render objects when the root is offscreen

Some parts of the meshes I’m working with are quite far away from the position of the transform, and when that point is off screen, the whole thing stops rendering. How can I make it stay visible?

It isn’t a skinned mesh renderer, just a normal mesh.

I should also add that I am dynamically modifying the mesh.

Are you calling Mesh.RecalculateBounds() after modifying the mesh?