By default, Lumen handles metallic objects appearing in reflections poorly. Surface cache offers only a matte base color that doesn't look metallic, and the higher quality hit lighting only shows pure black. We can set up a cubemap as a fallback when the screen trace fails to give a much more metallic look. This combination of old school techniques with the new Lumen technology provides results that rival true raytracing for much less performance cost.
Custom Node Text:
#if LUMEN_CARD_CAPTURE
return InputA;
#else
return InputB;
#endif
