I was using text to image feature of course for these, I like DC comics and marvel ones. I think you could even generate linux themes for KaOS desktop backgrounds using this below , it makes great images also I used Easy Stable Diffusion before but these ones I got from microsoft AI image generator site. if you use Easy Diffusion or stable Diffusion on either windows or Linux you can upsize the images into 4k resolution's if needed.
like these examples look great generated them from Image Creator powered by DALL·E 3 from Microsoft Bing.
Ok that's all I am going to create on the Linux theme but it's easy to use as long as you don't use a word or two that it does not like, a few images do get blocked from creating at that site, example like wrong words cause it to have problems still. if you misspell linux penguins for example, it can cause it problems and will not generate the images and block the generated images.
Sorry but thats all I am going to try to create today on that subject don't want to break the multiverse with Linux Penguins and Dc and Marvel stuff together. 🙂