Good if 'lifting' can help. Actually, then I suppose there are other techniques as well. Such as applying a contrast background (lime or something) and render both a q1 and a q4 image. With photo editing software it would be easy to overlay the contrast colour (making the rest transparent) on the q4 rendering. I think Ceciliabr explains this in a thread somewhere. And I need to emphasise - if you want to do serious rendering, you should study some of the threads where more advanced techniques are explained. Me, I always opt for quick-dirty-simple soloutions
I admire, but have no patience to create the kind of perfection displayed in other threads. ok