fixes #0003583: Using the raytracing WB crashes FreeCAD
fixes #0003583: Using the raytracing WB crashes FreeCAD

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master