add blank material files

valve/pbr/halflife.wad/-BABTECH8/-BABTECH8.mat

@@ -0,0 +1,24 @@
+
+{
+"for" "-0BABTECH8"
+//"basecolor_map" "-0BABTECH8.png"
+//"normal_map" "-0BABTECH8_normal.png"
+//"metal_map" "-0BABTECH8_metal.png"
+//"roughness_map" "-0BABTECH8_roughness.png"
+}
+
+{
+"for" "-1BABTECH8"
+//"basecolor_map" "-1BABTECH8.png"
+//"normal_map" "-1BABTECH8_normal.png"
+//"metal_map" "-1BABTECH8_metal.png"
+//"roughness_map" "-1BABTECH8_roughness.png"
+}
+
+{
+"for" "-2BABTECH8"
+//"basecolor_map" "-2BABTECH8.png"
+//"normal_map" "-2BABTECH8_normal.png"
+//"metal_map" "-2BABTECH8_metal.png"
+//"roughness_map" "-2BABTECH8_roughness.png"
+}