I'm observing some dark spots in some of the deep parts of the nose, too. Will take note of that in future renders. Yeah it's polypaint and zbrush render for this piece. I was thinking of retopologizing and putting in more detailed textures but I thought I'd apply it in my next piece. Thanks for the feedback!
Not an expert on anatomy but I think your sculpt looks absolutely great. Maybe you should clean the nose a bit. It looks lumpy at the end. First pic is polypaint in zbrush right? Dont ruin a great model with this mediocre render.