ultra realistic illustration, painting of a cinematic still of winter is coming, advertising poster, highly detailed, digital painting, artstation, concept art, smooth, sharp focus, illustration, art by artgerm and greg rutkowski and alphonse mucha extremely detailed digital painting, in the style of fenghua zhong and ruan jia and jeremy lipking and peter mohrbacher, predominant colors are cyan and blue, rim light, beautiful lighting, 8 k, raytracing, octane, trending on artstation