add blank material files

bshift/pbr/models/osprey.mdl/osprey.mdl.mat

@@ -0,0 +1,16 @@
+
+{
+"for" "#models/osprey/osprey_overall1.mdl"
+//"basecolor_map" "osprey_overall1.png"
+//"normal_map" "osprey_overall1_normal.png"
+//"metal_map" "osprey_overall1_metal.png"
+//"roughness_map" "osprey_overall1_roughness.png"
+}
+
+{
+"for" "#models/osprey/osprey_overall2.mdl"
+//"basecolor_map" "osprey_overall2.png"
+//"normal_map" "osprey_overall2_normal.png"
+//"metal_map" "osprey_overall2_metal.png"
+//"roughness_map" "osprey_overall2_roughness.png"
+}