Really enjoying your stuff man. I dig it’s a WIP.
On rendering, I highly recommend Marmoset 2. I’ve tried Zbrush, and while it can be pretty powerful, I find compositing to be a must for a final image. The settings can be pretty strange as well, so I prefer a more out of the box kind of rendering platform, which Marmoset 2 delivers on. It can really handle those high poly counts now, as well as vertex colors (Zbrush polypaint) so if you export the high poly OBJ with polypaint on, it’ll export the vertex colors so that you can render them in Marmoset. I recommend you check it out if you haven’t already. Great stuff though, and I appreciate you taking my critique into consideration. Keep it up.