diff --git a/valve/pbr/halflife.wad/halflife.wad.mat b/valve/pbr/halflife.wad/halflife.wad.mat
index ddea320..ad02846 100644
--- a/valve/pbr/halflife.wad/halflife.wad.mat
+++ b/valve/pbr/halflife.wad/halflife.wad.mat
@@ -7395,12 +7395,16 @@ include "-[~LIGHT]/-[~LIGHT].mat"
 }
 
 {
-"for" "LAB1_B4"
+"for" "LAB1_B4" // WARNING: generic material, need specific patches for some maps
 //"basecolor_map" "LAB1_B4.png"
+//"basecolor_map" "/colors/white.png"
+//"base_color" "0.7 0.7 0.7"
 //"normal_map" "LAB1_B4_normal.png"
 //"metal_map" "/colors/white.png"
 //"metal_map" "LAB1_B4_metal.png"
 //"roughness_map" "LAB1_B4_roughness.png"
+//"metalness" "1"
+//"roughness" "0.2"
 }
 
 {
@@ -7959,9 +7963,12 @@ include "-[~LIGHT]/-[~LIGHT].mat"
 {
 "for" "LAB1_GEAR3"
 //"basecolor_map" "LAB1_GEAR3.png"
+"base_color" "1.5 1.5 1.5" // TODO: remove hack
 //"normal_map" "LAB1_GEAR3_normal.png"
 //"metal_map" "LAB1_GEAR3_metal.png"
 //"roughness_map" "LAB1_GEAR3_roughness.png"
+"metalness" "1"
+"roughness" "0.3"
 }
 
 {
diff --git a/valve/pbr/maps/c1a0.bsp/c1a0.bsp.mat b/valve/pbr/maps/c1a0.bsp/c1a0.bsp.mat
new file mode 100644
index 0000000..e10b02b
--- /dev/null
+++ b/valve/pbr/maps/c1a0.bsp/c1a0.bsp.mat
@@ -0,0 +1,12 @@
+{
+"for" "LAB1_B4"
+//"basecolor_map" "LAB1_B4.png"
+"basecolor_map" "/colors/white.png"
+"base_color" "0.7 0.7 0.7"
+//"normal_map" "LAB1_B4_normal.png"
+//"metal_map" "/colors/white.png"
+//"metal_map" "LAB1_B4_metal.png"
+//"roughness_map" "LAB1_B4_roughness.png"
+"metalness" "1"
+"roughness" "0.2"
+}
\ No newline at end of file