fix red lighting with PVL in mac-os

Author: glassmancody

files/shaders/compatibility/objects.frag

@@ -72,6 +72,7 @@ uniform float distortionStrength;
 
 #if !PER_PIXEL_LIGHTING
 centroid varying vec3 passLighting;
+centroid varying vec3 passDiffuseLighting;
 centroid varying vec3 passSpecular;
 centroid varying vec3 shadowDiffuseLighting;
 centroid varying vec3 shadowSpecularLighting;
@@ -220,7 +221,9 @@ vec2 screenCoords = gl_FragCoord.xy / screenRes;
     float shadowing = unshadowedLightRatio(-passViewPos.z);
     vec3 lighting, specular;
 #if !PER_PIXEL_LIGHTING
-    lighting = passLighting + shadowDiffuseLighting * shadowing;
+    lighting = passDiffuseLighting * diffuseColor.xyz + passLighting;
+    clampLightingResult(lighting);
+    lighting += shadowDiffuseLighting * diffuseColor.xyz * shadowing;
     specular = passSpecular + shadowSpecularLighting * shadowing;
 #else
 #if @specularMap

files/shaders/compatibility/objects.vert

@@ -53,6 +53,7 @@ varying vec2 glossMapUV;
 
 #if !PER_PIXEL_LIGHTING
 centroid varying vec3 passLighting;
+centroid varying vec3 passDiffuseLighting;
 centroid varying vec3 passSpecular;
 centroid varying vec3 shadowDiffuseLighting;
 centroid varying vec3 shadowSpecularLighting;
@@ -150,10 +151,11 @@ void main(void)
 #if !PER_PIXEL_LIGHTING
     vec3 diffuseLight, ambientLight, specularLight;
     doLighting(viewPos.xyz, viewNormal, gl_FrontMaterial.shininess, diffuseLight, ambientLight, specularLight, shadowDiffuseLighting, shadowSpecularLighting);
-    passLighting = getDiffuseColor().xyz * diffuseLight + getAmbientColor().xyz * ambientLight + getEmissionColor().xyz * emissiveMult;
+    passLighting = getAmbientColor().xyz * ambientLight + getEmissionColor().xyz * emissiveMult;
+    passDiffuseLighting = diffuseLight;
     passSpecular = getSpecularColor().xyz * specularLight * specStrength;
     clampLightingResult(passLighting);
-    shadowDiffuseLighting *= getDiffuseColor().xyz;
+    clampLightingResult(passDiffuseLighting);
     shadowSpecularLighting *= getSpecularColor().xyz * specStrength;
 #endif