Makes necks a bit longerer, or very very longerer, you decide! Supports the following prompts in order of length: extended neck, long neck, stretched neck, looped neck, rokurokubi. Also has a little bit of giraffe skin texture trigger baked in (ymmv). It can do realistic and some anime/drawings.
If you want looped neck / rokurokubi, be prepared to mess with weights (I find 1.2 for the trigger words works best) and do quite a bit of cherry picking (I sometimes had to generate 20 base images before finding one worth upscaling). When the neck starts connecting better you'll know you're getting the tuning right!
Best results were with transformix v1 at a weight of 1. Generally I find that turning the lyco down for img2img (.8 or so) gives better looking necks. Sometimes turning the trigger word weight can allow you to turn the lyco weight down for img2img.