Is it possible to create own JAV using AI technology?

LOL sorry, that made me laugh!

Maybe it's the model you're using, is it a base LTX? There is another newer(ish) one I saw that is supposed to be better with NSFW because it was trained only on people. I think... Also, have you tried using a LoRA that's NSFW if there are any for LTX? I'm still using Wan. After I finish my trailer I'll take a crack at your images and see if Wan has any better luck.
According to copilot, the neck-grabbing is down to LTX having been trained on socila media clips which are mostly people having arguments and slapping each other around. Go figure.

Yeah, I'm using a bas LTX model, but I'm going to move on to CogVideoX‑5B in comfyui just as soon as I can find enough disc space for the installation.

I am still weirded out by the fact that if someone's face is not in frame in the source photo it is hallucinated by the model. In my alley scene above, his head disappears for a moment or two behind hers. When I try to stitch on another clip, it emerges completely different!