That's amazing, I recall an article, maybe on BoLS or From the Warp ages ago that was discussing the way things were being painted and how the 'eavy metal way of doing things had started to be replicated across the board with some many armies ending up looking the same. I specifically referred to painting things in a style, that it would be a brave individual who brought out a Sin City style army, all monochrome with extreme highlights etc. The referenced another painterly style but as I think about it now I think you've achieved what they were getting at. I hope you can replicate the same effect across the entire army, I absolutely love it. Could you imagine if they were all lit from the same side and positioned you could recreate one of those old battle paintings, y'know the sort GW uses for inspiration themselves
Just replace the guys with daemons