diff --git a/src/shaders/cube.frag b/src/shaders/cube.frag
index 1f02dd0..56a9650 100644
--- a/src/shaders/cube.frag
+++ b/src/shaders/cube.frag
@@ -27,15 +27,10 @@ float fbm( vec4 p ) {
 }
 
 void main() {
-  float rough = smoothstep( -0.6, 0.6, fbm( vPositionWithoutModel ) );
-  // vec3 ndisp = rough * 0.2 * vec3(
-  //   fbm( 1.577 + 4.0 * vPosition ),
-  //   fbm( 12.577 + 4.0 * vPosition ),
-  //   fbm( 27.577 + 4.0 * vPosition )
-  // );
+  float rough = sin( 14.0 * fbm( vPositionWithoutModel ) );
 
   fragPosition = vPosition;
   fragNormal = vec4( normalize( vNormal ), 1.0 );
-  fragColor = vec4( vec3( 0.5 - 0.3 * rough ), 1.0 );
-  fragWTF = vec4( vec3( 0.3 + 0.2 * rough, 0.9, 0.0 ), MTL_PBR );
+  fragColor = vec4( vec3( 0.5 ), 1.0 );
+  fragWTF = vec4( vec3( 0.2 + 0.03 * rough, 0.17, 0.0 ), MTL_PBR );
 }
diff --git a/src/shaders/rings.frag b/src/shaders/rings.frag
index 75082c9..defa278 100644
--- a/src/shaders/rings.frag
+++ b/src/shaders/rings.frag
@@ -2,7 +2,7 @@
 
 precision highp float;
 
-const int MTL_UNLIT = 1;
+const int MTL_PBR = 2;
 
 in float vLife;
 in vec4 vPosition;
@@ -17,7 +17,7 @@ uniform float time;
 
 void main() {
   fragPosition = vPosition;
-  fragNormal = vec4( vNormal, 1.0 );
-  fragColor = vec4( 0.6, 1.8, 1.2, 1.0 );
-  fragWTF = vec4( vec3( 0.0, 0.0, 0.0 ), MTL_UNLIT );
+  fragNormal = vec4( normalize( vNormal ), 1.0 );
+  fragColor = vec4( 0.2, 0.9, 0.5, 1.0 );
+  fragWTF = vec4( vec3( 0.2, 0.2, 4.0 ), MTL_PBR );
 }