bool doTonemap = true;
#ifdef HAS_GBUFFER
// doTonemap = getToneMapBit(getGBufferFlags(vUv).a) > 0; // todo
#if TONEMAP_BACKGROUND < 1
if(isBackground) doTonemap = false;
#endif
#endif
if(doTonemap) diffuseColor = ToneMapping(diffuseColor);