message: Switch desktop to interleaved RGB noise
  This eliminates the flicker caused by triangle noise based dithering
  when FXAA is turned on. This will require further investigation to
  see if we can use triangle noise with FXAA without such artifacts.
diff: #ifdef TARGET_MOBILE
  #define DITHERING_OPERATOR DITHERING_INTERLEAVED_NOISE
  #else
  - #define DITHERING_OPERATOR DITHERING_TRIANGLE_NOISE_RGB
  + #define DITHERING_OPERATOR DITHERING_VLACHOS
  #endif
  //------------------------------------------------------------------------------
  