Face's totdisp was set to correct value, but memory hasn't been allocated for disps. Handle this in multires_topology_changed(), so the whole MDISPS layer wouldn't be totally re-allocated when applying displacement.
Face's totdisp was set to correct value, but memory hasn't been allocated for disps. Handle this in multires_topology_changed(), so the whole MDISPS layer wouldn't be totally re-allocated when applying displacement.