this post was submitted on 30 Jul 2023
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TL;DR The new method still requires his art.
LoRA is a way to add additional layers to a neural network that effectively allow you to fine tune it's behaviour. Think of it like a "plugin" or a "mod"
LoRas require examples of the thing you are targeting. Lots of people in the SD community build them for particular celebrities or art styles by collecting examples of the that celebrity or whatever from online.
So in this case Greg has asked Stable to remove his artwork which they have done but some third party has created an unofficial LoRA that does use his artwork to mod the functionality back in.
In the traditional world the rights holder would presumably DMCA the plugin but the lines are much blurrier with LoRA models.
Great explanation, thanks!