void plastic mesh_material 0 0 5 1.0 0.0 0.0 0.0 0.0 void mixfunc y_perforation 6 mesh_material void y_hole perforate.cal -s 0.0024 0 1 0.229167 y_perforation polygon Face_425a49ee 0 0 12 -0.05 -8.5 1.65 0.05 -8.5 1.65 0.05 -8.5 1.75 -0.05 -8.5 1.75