LoRA

On his personal page on the CivitAI website, the user BigHeadTF promotes his recent creation, a small model called The Incredible Hulk (2008). Compared to earlier movies of the Hulk, the 2008 version shows a tormented Bruce Banner who transforms into a green creature with "detailed musculature, dark green skin, and an almost tragic sense of isolation". The model helps generate characters resembling this iconic version of Hulk in new images.

To demonstrate the capabilities of his model, BigHeadTF has selected a few pictures of his own.

To generate an image, one needs a model suited for the kind of picture they want. The best known such as Stable Diffusion or Flux are rather general-purpose. These 'base' or 'foundation' models can be used to generate images in many styles and can handle a huge variety of prompts. But they may show limitations when a user wants a specific output such as a particular genre of manga, a style that emulates black and white film noir or when an improvement is needed for some details (specific hands positions, etc) or to produce legible text. This is where LoRAs come in. A LoRA is a smaller model created with a technique that makes it possible to improve the performance of a base model on a given task.

What is a LoRA?

Initially developed for LLMLow-Rank Adaptation of Large Language Models. Technically the LoRA freezes an existing model and insert a smaller number of weights to adjust the model's behaviour to a particular need. Instead of a full retraining of the model, LoRAs only require the training of the weights that have been inserted. Therefore LoRAs are quite lightweight and able to leverage the capabilities of larger models. Users equipped with a consumer-grade GPU can train their own LoRAs reasonably fast (on a mac M3, a LoRA can be produced in 30 minutes). LoRAs are quite popular within communities of amateurs and developers alike. At the time of writing, the AI platform Hugging Face lists 71,312 LoRAs.

What is the network that sustains this object?

Free software libraries and apps
Tutorials and documentations
- https://education.civitai.com/lora-training-glossary/
- https://civitai.com/articles/4/make-your-own-loras-easy-and-free
- https://civitai.com/articles/8310/lora-training-using-illustrious-report-by-a-beginner Since Illustrious learned on danbooru, she has memorized many of the Art Styles of the artists who have contributed to danbooru. Therefore, it is better to check if it is already learned Art Style you want to resemble, so that you do not have to waste your time. Note that I wasted several hours trying to create the Art Style of my favorite doujinshi and eroge illustrators
Technical communities and Manga fans
- https://civitai.com/articles/197/not-maintained-anymore-use-tag-search-instead-arknights-lora-collection-in-alphabetical-order
- https://civitai.com/articles/166/lora-training-guide-rz-passage-21-15
Dependency on base models: This LoRa model was designed to generate images that look more "real" and less "artificially AI-generated by FLUX". It achieves this by making the natural and artificial lighting look more real and making the bokeh less strong. It also adds details to every part of the image, including skin, eyes, hair, and foliage. It also aims to reduce somewhat the common "FLUX chin and skin" and other such issues. https://civitai.com/models/970862/amateur-snapshot-photo-style-lora-flux