Photorealistic image, real human character — not AI-illustration style, not 3D-rendered, not cartoon. Extreme close-up on the Neanderthal man's eyes, large and wide-set, pupils slightly dilated to capture as much available light as possible in the dim, overcast Ice Age environment. His weathered pale skin and rough brow ridge frame the eyes clearly. Real terrain reflected faintly in the low light — hints of snow and grey sky visible in the ambient lighting on his face. Photorealistic lighting, deliberately dim and naturalistic, low-contrast to emphasize how little light there is for his eyes to work with. Documentary-style realism, intimate and biologically focused mood.