Right. I've been looking at his webpage (selling prints for 45€). I found this one to be particularly revealing. As you say, you've been doing DnD stuff in Midjourney (so have I) I reckon this will be revealing to you as well, given Midjourney "ability" to do full body shots. https://i.imgur.com/YwDR1Xa.png

I will say that I think he retouches it in Photoshop. Adding drop shadows, adding the "old film" filter, doing B/W, and those glowy eyes (Like Elijah Wood's character in Sin City)