add materials (mat) files and readme.md

cstrike/models/player/urban.mdl/urban.mdl.mat

@@ -0,0 +1,16 @@
+
+{
+"for" "#models/urban/Backpack2.mdl"
+"basecolor_map" "Backpack2.png"
+//"normal_map" "Backpack2_normal.png"
+//"metal_map" "Backpack2_metal.png"
+//"roughness_map" "Backpack2_roughness.png"
+}
+
+{
+"for" "#models/urban/SEAL_Working1.mdl"
+"basecolor_map" "SEAL_Working1.png"
+//"normal_map" "SEAL_Working1_normal.png"
+//"metal_map" "SEAL_Working1_metal.png"
+//"roughness_map" "SEAL_Working1_roughness.png"
+}