diff --git a/shaders/bloom-highpass.f.glsl b/shaders/bloom-highpass.f.glsl
index ec45636..24bf5d2 100644
--- a/shaders/bloom-highpass.f.glsl
+++ b/shaders/bloom-highpass.f.glsl
@@ -12,6 +12,9 @@ layout( location = 0 ) out vec3 color;
 
 void main( void )
 {
-	vec3 c = textureLod( u_Input , gl_FragCoord.xy / u_InputSize.xy , u_LOD ).xyz;
-	color = max( vec3(0) , ( pow( c , vec3( u_FilterParams.x ) ) * u_FilterParams.y - c ) / u_FilterParams.z );
+	const vec3 c = textureLod( u_Input ,
+		gl_FragCoord.xy / u_InputSize.xy , u_LOD ).xyz;
+	color = max( vec3( 0 ) ,
+		( pow( c , vec3( u_FilterParams.x ) ) * u_FilterParams.y - c )
+			/ u_FilterParams.z );
 }
diff --git a/shaders/blur-pass.f.glsl b/shaders/blur-pass.f.glsl
index 8545829..f0b610c 100644
--- a/shaders/blur-pass.f.glsl
+++ b/shaders/blur-pass.f.glsl
@@ -14,7 +14,6 @@ void main( void )
 {
 	vec2 tmp = gl_FragCoord.xy / u_OutputSize;
 	vec2 disp = u_Direction / u_OutputSize;
-	float wt = u_Weights.x + u_Weights.y * 2 + u_Weights.z * 2 + u_Weights.w * 2;
 	color = u_Weights.x * textureLod( u_InputTexture , tmp , u_SourceLOD ).xyz
 		+ u_Weights.y * (
 			textureLod( u_InputTexture , tmp + disp , u_SourceLOD ).xyz
@@ -26,5 +25,5 @@ void main( void )
 			textureLod( u_InputTexture , tmp + disp * 3 , u_SourceLOD ).xyz
 			+ textureLod( u_InputTexture , tmp - disp * 3 , u_SourceLOD ).xyz )
 	;
-	color /= wt;
+	color /= u_Weights.x + 2 * ( u_Weights.y + u_Weights.z + u_Weights.w );
 }
diff --git a/shaders/lib/shading-pbr.glsl b/shaders/lib/shading-pbr.glsl
index bc94553..325e9d1 100644
--- a/shaders/lib/shading-pbr.glsl
+++ b/shaders/lib/shading-pbr.glsl
@@ -63,7 +63,7 @@ T_PBRPrecomputed PBR_Precompute(
 
 	float tDir = step( .99 , abs( normal.z ) ) ,
 		aspect = sqrt( 1 - material.anisotropy * .9 ) ,
-		rsqr = material.roughness * material.roughness;
+		rsqr = M_Sqr( material.roughness );
 
 	vec3 tUp = mix( vec3( 0 , 0 , 1 ) , vec3( 1 , 0 , 0 ) , tDir ) ,
 		tint = M_NormalizeColor( material.cAlbedo );
diff --git a/shaders/scene.f.glsl b/shaders/scene.f.glsl
index 410272a..06e6eba 100644
--- a/shaders/scene.f.glsl
+++ b/shaders/scene.f.glsl
@@ -18,7 +18,7 @@ T_PBRMaterial PBRMaterials[1] = {
 		// Albedo color
 		vec3( .9 , 1 , .9 ) ,
 		// Roughness , metallic , subsurface , anisotropy
-		.25 , .5 , .9 , .9 ,
+		.15 , .5 , .9 , .9 ,
 		// Specular strength / tint%
 		.5 , .5
 	}
@@ -124,7 +124,7 @@ void main( )
 
 		const int midx = int( r.y );
 		const vec3 sunlightDir = normalize( vec3( 0 , 1 , 1 ) );
-		const vec3 sunlightColor = vec3( 1 , 1 , .99 ) * .1;
+		const vec3 sunlightColor = vec3( 1 , 1 , .99 ) * .05;
 		const vec3 pl1Pos = vec3( 3 , 3 , 5 );
 		const vec3 pl1Color = vec3( 1 , .7 , .8 );
 		const float pl1Power = 20;