It seems like the model was trained on images that were "trending on artstation", see here: https://www.reddit.com/r/DiscoDiffusion/comments/u01cnw/how_are_prom

It seems like the model was trained on images that were "trending on artstation", see here: https://www.reddit.com/r/DiscoDiffusion/comments/u01cnw/how_are_prompts_like_trending_on_artstation_so/ https://www.reddit.com/r/DiscoDiffusion/comments/u01cnw/how_... So it might be that all images have a distinctive look, or influences of it, and this phrase is becoming kind of an inside joke/meme.