Fixed the colored and diffuse specular fragment shaders.

gameplay/res/shaders/colored-specular.fsh

@@ -30,8 +30,6 @@ void lighting(vec3 normalVector, vec3 cameraDirection, vec3 lightDirection, floa
 
     // Diffuse
 	float ddot = abs(dot(normalVector, lightDirection));
-	if (ddot < 0)
-		ddot = abs(ddot) * 0.25f; // simulate light bounce at partial intensity
     float diffuseIntensity = attenuation * ddot;
     diffuseIntensity = max(0.0, diffuseIntensity);
     _diffuseColor = u_lightColor * _baseColor.rgb * diffuseIntensity;

gameplay/res/shaders/diffuse-specular.fsh

@@ -26,8 +26,6 @@ void lighting(vec3 normalVector, vec3 cameraDirection, vec3 lightDirection, floa
 
     // Diffuse
 	float ddot = dot(normalVector, lightDirection);
-	if (ddot < 0)
-		ddot = abs(ddot) * 0.25f; // simulate light bounce at partial intensity
     float diffuseIntensity = attenuation * ddot;
     diffuseIntensity = max(0.0, diffuseIntensity);
     _diffuseColor = u_lightColor * _baseColor.rgb * diffuseIntensity;