Prompt: hyperrealistic photo of ___, realistic proportions, highly detailed, smooth, sharp focus, 8k, ray tracing, digital painting, concept art illustration, by artgerm, trending on artstation, nikon d850
Some cool img2img transformations starting from pixelated images on Stabile Diffusion via Reddit.
Also the following images are via Reddit:
NES games remastered with Stable Diffusion img2img