add blank material files

cstrike/pbr/cs_cbble.wad/-Rock/-Rock.mat

@@ -0,0 +1,32 @@
+
+{
+"for" "-0Rock"
+//"basecolor_map" "-0Rock.png"
+//"normal_map" "-0Rock_normal.png"
+//"metal_map" "-0Rock_metal.png"
+//"roughness_map" "-0Rock_roughness.png"
+}
+
+{
+"for" "-1Rock"
+//"basecolor_map" "-1Rock.png"
+//"normal_map" "-1Rock_normal.png"
+//"metal_map" "-1Rock_metal.png"
+//"roughness_map" "-1Rock_roughness.png"
+}
+
+{
+"for" "-2Rock"
+//"basecolor_map" "-2Rock.png"
+//"normal_map" "-2Rock_normal.png"
+//"metal_map" "-2Rock_metal.png"
+//"roughness_map" "-2Rock_roughness.png"
+}
+
+{
+"for" "-3Rock"
+//"basecolor_map" "-3Rock.png"
+//"normal_map" "-3Rock_normal.png"
+//"metal_map" "-3Rock_metal.png"
+//"roughness_map" "-3Rock_roughness.png"
+}