diff --git a/src/art/webgl/engine.js b/src/art/webgl/engine.js
index ab77c0cc96897b0a2d0aea115cd4647f0c65a8b4..68e2789f40d84c9636d32807efc30e721bb20e88 100644
--- a/src/art/webgl/engine.js
+++ b/src/art/webgl/engine.js
@@ -544,7 +544,7 @@ App.Art.Engine = class {
 
 						// kS is equal to Fresnel
 						vec3 kD = vec3(1.0) - F;
-						kD *= min(1.0 - metallic, 0.9999);	  
+						kD *= 1.0 - min(metallic, 0.9999);	  
 						
 						// add to outgoing radiance Lo
 						float NdotL = max(dot(N, L), 0.0);
@@ -593,7 +593,7 @@ App.Art.Engine = class {
 
 						// kS is equal to Fresnel
 						vec3 kD = vec3(1.0) - F;
-						kD *= min(1.0 - metallic, 0.9999);;
+						kD *= 1.0 - min(metallic, 0.9999);
 				
 						// add to outgoing radiance Lo
 						float NdotL = max(dot(N, L), 0.0);