Found out there's a third type of "deepfake" that I hadn't really known about. The underlying tech is actually a bit unrelated and is called "pix2pix". Essentially what it does is it takes in a source template, and a pre-made learned style data, and applies the style to the source. So for instance you can make artwork into different styles, or make complete photo-realistic drawings out of a quick sketch. Or the more terrifying application: make photos of people look like other photos of people.
I had seen things like https://thispersondoesnotexist.com/ https://www.thiscatdoesnotexist.com/ and https://www.thiswaifudoesnotexist.net/ but I never really thought past the implications of it. I saw the video versions of this sort of thing (applying a source content to a premade video style) but didn't really realize a generative version for photos could work.
There is also full body generation ( https://datagrid.co.jp/all/release/386/ ).
So here's the scary part, such technology can be used to change clothing style or effectively create nudes of people. So sort of like the oldest deepfake tech, but in reverse. Instead of swapping the face you're swapping the clothes. IE stripping the person in the photo. So naturally I was horribly curious and it was kinda easy to set up for me. And I got to work taking pics of myself seeing what the extent was and how far it could go. I also tried some professional shots in various stages of undress, along with some amateur photos (to test low quality).
And the results are kinda..... mixed. Things like professional photoshoots in bikinis and light clothing work shockingly well, though there's some artifacting (you can tell its a fake in every case). In certain cases, both amateur and professional, the quality was well above what I've seen certain porn end up at, and the results looked realistic.
It also worked quite well even for people fully clothed. It was able to remove things like leggings but having notable blur/distortion along the legs. Shorts and t-shirts were removed fine. For tops it worked best with midriff showing, rather than having it covered up (it uses the navel to help align/detect). Long tops (tunics and such), dresses, and skirts all obscure the pelvic area and as a result have poor results, especially if the naval is also covered.
My own photos.... didn't go so well. My fully clothed photos ended up horribly disorted or improperly detected (my camera is low quality and I dress modestly). One photo I was wearing a t-shirt and jeans and it properly stripped, ending up with blurred legs, along with some distortion on the added nudity. Trying in underwear it ends up removing panties, but it was having difficulties with my bra, and worked better if I removed that entirely (ie just having it remove panties). It altered my breast size and never actually detected it properly, though it matched my and others' skin tone properly in every photo. Though some of the photos I took from online were altered as if there was a color filter over it.
TL;DR: Despite this seeming scary, it's actually not that bad. Just avoid skin-tight clothes and anything revealing (ie swimwear/undies). Though in the future this could be horrifying, specifically if it becomes popular or widespread. Especially since on my crappy old laptop the photos took less than a minute to create.
I'm linking to this example image of a 3D modeled character as an example of the capabilities and the various steps the software does. Please do not seek out or use this software on real people without their consent. Thank you for respecting people's privacy. This is an informational post on technological capabilities.