Thanks, sjefen, I will try what that does. And regarding the sky; WAS, this is not an arctic scene, but a Dutch late summer scene in Eemien era, so a lot lower latitude. Sun can be pretty high. Actually I like the bright sky, as it doesn't fill the image with too much 'information'. It keeps it still, so to speak. I only don't want the clouds to have large bleached areas.
In the meantime I've asked on the ZBrush forum about hair colors, and guess who helped me out; Jochen. Big thanks to him. But thanks for your offer, Nils. I have a video telling me how to proceed. I will keep it decent in terms of GB's.
More poses would be good, indeed. But that would need to be bending legs in ZB, as I've never rigged anything (yet). Maybe I should add one or two standing and looking back, just to offset the running herd.