adds toLinear and toGamma helper functions for ColorF, uses the former in adjusting lights.

Engine/source/core/color.h

@@ -104,6 +104,9 @@ class ColorF
                                       (alpha >= 0.0f && alpha <= 1.0f); }
    void clamp();
 
+   ColorF toLinear() const;
+   ColorF toGamma() const;
+
    static const ColorF ZERO;
    static const ColorF ONE;
    static const ColorF WHITE;
@@ -462,6 +465,16 @@ inline void ColorF::clamp()
       alpha = 0.0f;
 }
 
+inline ColorF ColorF::toLinear() const
+{
+   return ColorF(mPow(red, 2.2f), mPow(green, 2.2f), mPow(blue, 2.2f), alpha);
+}
+
+inline ColorF ColorF::toGamma() const
+{
+   return ColorF(mPow(red, 1.0f / 2.2f), mPow(green, 1.0f / 2.2f), mPow(blue, 1.0f / 2.2f), alpha);
+}
+
 //------------------------------------------------------------------------------
 //-------------------------------------- INLINES (ColorI)
 //

Engine/source/lighting/advanced/advancedLightBinManager.cpp

@@ -681,7 +681,7 @@ void AdvancedLightBinManager::LightMaterialInfo::setLightParameters( const Light
    F32 lumiance = mDot(*((const Point3F *)&lightInfo->getColor()), colorToLumiance );
    col.alpha *= lumiance;
 
-   matParams->setSafe( lightColor, col );
+   matParams->setSafe( lightColor, col.toLinear() );
    matParams->setSafe( lightBrightness, lightInfo->getBrightness() );
 
    switch( lightInfo->getType() )
@@ -697,7 +697,7 @@ void AdvancedLightBinManager::LightMaterialInfo::setLightParameters( const Light
          // the vector light. This prevents a divide by zero.
          ColorF ambientColor = renderState->getAmbientLightColor();
          ambientColor.alpha = 0.00001f;
-         matParams->setSafe( lightAmbient, ambientColor );
+         matParams->setSafe( lightAmbient, ambientColor.toLinear() );
 
          // If no alt color is specified, set it to the average of
          // the ambient and main color to avoid artifacts.
@@ -711,7 +711,7 @@ void AdvancedLightBinManager::LightMaterialInfo::setLightParameters( const Light
             lightAlt = (lightInfo->getColor() + renderState->getAmbientLightColor()) / 2.0f;
 
          ColorF trilightColor = lightAlt;
-         matParams->setSafe(lightTrilight, trilightColor);
+         matParams->setSafe(lightTrilight, trilightColor.toLinear());
       }
       break;