I'm also interested in this.
About a year ago (June 2022), there was Craiyon. I didn't know what AI art was back then. You could type any topic into Craiyon to generate wacky images and it became some sort of 'meme' in my WhatsApp and Signal group chats. I didn't think much of it.
Then I discovered Stable Diffusion. Again, type in any topic and it creates weird stuff for you.
Stable Diffusion is a deep learning model that generates images from text descriptions. Use Stable Diffusion online for free.
stablediffusionweb.com
My best shot at it was probably "bird in the milky way".
Now the thing is, that these images are only 512x512, yet people on deviantART are uploading images of 2000x3000 (6MP). How is this being achieved? I messaged a few of these deviantART users on how they're doing it, but none of them ever respond to me. It's like they're trying to protect some secret recipe, while not hiding the fact tha they're using AI art because they put "aiart" and "stablediffusion" etc in the image's meta tags, and with "Created using AI tools" written underneath. The AI tools surely got to be public domain?