glsl/forwardLighting: do not compute specularity with physical map

Author: illwieckz

src/engine/renderer/glsl_source/forwardLighting_fp.glsl

@@ -975,12 +975,13 @@ void	main()
 	}
 	diffuse.rgb *= u_LightColor * NL;
 
+#if !defined(USE_PHYSICAL_SHADING)
 #if defined(r_specularMapping)
-	// FIXME: ignore if PBR
 	// compute the specular term
 	vec4 spec = texture2D(u_MaterialMap, texCoords).rgba;
 	vec3 specular = spec.rgb * u_LightColor * pow(clamp(dot(normal, H), 0.0, 1.0), u_SpecularExponent.x * spec.a + u_SpecularExponent.y) * r_SpecularScale;
 #endif // r_specularMapping
+#endif // !USE_PHYSICAL_SHADING
 
 	// compute light attenuation
 #if defined(LIGHT_PROJ)
@@ -999,9 +1000,11 @@ void	main()
 	// compute final color
 	vec4 color = diffuse;
 
+#if !defined(USE_PHYSICAL_SHADING)
 #if defined(r_specularMapping)
 	color.rgb += specular;
 #endif // r_specularMapping
+#endif // !USE_PHYSICAL_SHADING
 
 #if !defined(LIGHT_DIRECTIONAL)
 	color.rgb *= attenuationXY;