add blank material files

valve/pbr/halflife.wad/-BABTECH7/-BABTECH7.mat

@@ -0,0 +1,24 @@
+
+{
+"for" "-0BABTECH7"
+//"basecolor_map" "-0BABTECH7.png"
+//"normal_map" "-0BABTECH7_normal.png"
+//"metal_map" "-0BABTECH7_metal.png"
+//"roughness_map" "-0BABTECH7_roughness.png"
+}
+
+{
+"for" "-1BABTECH7"
+//"basecolor_map" "-1BABTECH7.png"
+//"normal_map" "-1BABTECH7_normal.png"
+//"metal_map" "-1BABTECH7_metal.png"
+//"roughness_map" "-1BABTECH7_roughness.png"
+}
+
+{
+"for" "-2BABTECH7"
+//"basecolor_map" "-2BABTECH7.png"
+//"normal_map" "-2BABTECH7_normal.png"
+//"metal_map" "-2BABTECH7_metal.png"
+//"roughness_map" "-2BABTECH7_roughness.png"
+}