score_9, score_8_up, score_7_up, 8k high quality digital painting, masterpiece, very detailed, ultra realistic, (best quality) very detailed epic masterpiece, boris vallejo style, frank frazetta style, realistic oil painting, retro artstyle, full body, side view, backlight, we see a primeval muscular cave-man in fur clothing riding on his bear-like rhino-like monster, the monster has long fur hair, night, red brown, big full moon at the center of the picture, backlight, wide grassy landscape, fairytale-like, realistic detailed oil painting style Rembrandt style, Vermeer style, Dungeons and dragons atmosphere, heroic fantasy, realistic, realism, full body