Problem is that the orco layer was not taken care of by the GPU subdivision routines. This only handles the issues for EEVEE/Workbench. For Cycles, this would need to be handled at the wrapper level somehow.
Problem is that the orco layer was not taken care of by the GPU subdivision routines. This only handles the issues for EEVEE/Workbench. For Cycles, this would need to be handled at the wrapper level somehow.