add blank material files

gearbox/pbr/opfor.wad/+SIGN_VENT/+SIGN_VENT.mat

@@ -0,0 +1,16 @@
+
+{
+"for" "+0SIGN_VENT"
+//"basecolor_map" "+0SIGN_VENT.png"
+//"normal_map" "+0SIGN_VENT_normal.png"
+//"metal_map" "+0SIGN_VENT_metal.png"
+//"roughness_map" "+0SIGN_VENT_roughness.png"
+}
+
+{
+"for" "+ASIGN_VENT"
+//"basecolor_map" "+ASIGN_VENT.png"
+//"normal_map" "+ASIGN_VENT_normal.png"
+//"metal_map" "+ASIGN_VENT_metal.png"
+//"roughness_map" "+ASIGN_VENT_roughness.png"
+}