cinematic portrait of optimus prime, only head and chest, intricate, desaturated, tim hildebrandt, wayne barlowe, bruce pennington, donato giancola, larry elmore, maxfield parrish, moebius, thomas ehretsmann, oil on canvas, gouache painting, masterpiece, trending on artstation, cinematic composition, dramatic pose, volumetric lighting, sharp, details, hyper - detailed, hd, 4 k, 8 k 