The two images used for Cormac ref.

Ian Cormac, Adult male, ECS agent in the scifi Polity universe by Neal Asher, mid-to-late career. Short-cropped silver hair. Olive skin. Sharp, striking features — handsome, not pretty, not sculpted. Flat dead-grey eyes, little human warmth in them. A few small scars so the face is not too clean. Lean-athletic, boosted but not bulky. Wrist holster on one forearm, compact grey star-shaped device seated in it.
Kit: Earth-army trousers, desert boots, hardwearing monofilament shirt, sleeveless utility jacket. Thin-gun in hand. Cold professional stance.

GPT Image 2 had the best result.