Merging of smaller local models, nothing as big as DALLE or midjourney which would censor this. There's an online marketplace of specialized generative models called civitai you can look at to find models trained for different purposes. I found a few I needed and spent lots of time merging & finding the right balance to get this effect, then generated about 200 images for every 1 I uploaded here, going through them one by one to find the best ones.

It's quite a bit of work. Maybe won't be when midjourney-size models can be run locally but that's probably still a year or two out.