add materials (mat) files and readme.md

cstrike/models/v_sg550.mdl/v_sg550.mdl.mat

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+
+{
+"for" "#models/v_sg550/buttstock.mdl"
+"basecolor_map" "buttstock.png"
+//"normal_map" "buttstock_normal.png"
+//"metal_map" "buttstock_metal.png"
+//"roughness_map" "buttstock_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/forearm.mdl"
+"basecolor_map" "forearm.png"
+//"normal_map" "forearm_normal.png"
+//"metal_map" "forearm_metal.png"
+//"roughness_map" "forearm_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/handle.mdl"
+"basecolor_map" "handle.png"
+//"normal_map" "handle_normal.png"
+//"metal_map" "handle_metal.png"
+//"roughness_map" "handle_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/magazine_transp.mdl"
+"basecolor_map" "magazine_transp.png"
+//"normal_map" "magazine_transp_normal.png"
+//"metal_map" "magazine_transp_metal.png"
+//"roughness_map" "magazine_transp_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/receiver.mdl"
+"basecolor_map" "receiver.png"
+//"normal_map" "receiver_normal.png"
+//"metal_map" "receiver_metal.png"
+//"roughness_map" "receiver_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/scope.mdl"
+"basecolor_map" "scope.png"
+//"normal_map" "scope_normal.png"
+//"metal_map" "scope_metal.png"
+//"roughness_map" "scope_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/view_finger.mdl"
+"basecolor_map" "view_finger.png"
+//"normal_map" "view_finger_normal.png"
+//"metal_map" "view_finger_metal.png"
+//"roughness_map" "view_finger_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/view_glove.mdl"
+"basecolor_map" "view_glove.png"
+//"normal_map" "view_glove_normal.png"
+//"metal_map" "view_glove_metal.png"
+//"roughness_map" "view_glove_roughness.png"
+}
+
+{
+"for" "#models/v_sg550/view_skin.mdl"
+"basecolor_map" "view_skin.png"
+//"normal_map" "view_skin_normal.png"
+//"metal_map" "view_skin_metal.png"
+//"roughness_map" "view_skin_roughness.png"
+}