There are over 10,000 images tagged "bad anatomy" on various online boorus. These images often have related tags like "bad hands" and "bad feet" as well.
Similar to my Boring SD XL Negative LORA (https://civitai.com/models/421889?modelVersionId=475811), this LORA was trained on all of those images tagged "bad anatomy" or similar. Therefore putting it in the Negative Prompt should tell the AI to avoid these things and thus improve anatomy.
Pros:
-Does seem to improve anatomy in my testing, though the AI still isn't perfect
Could be Pro or Con depending on what you want:
-Tends to generate more detailed backgrounds
-Tends towards a more detailed or more realistic look for Sea Art XL. For the Autism Mix version it tends towards a more anime look.
Cons:
-Definitely doesn't fix all anatomy issues
-Putting it in the positives can be detrimental
First version named "badanatomy_SDXL_negative_LORA_SeaArtXL_v1" was trained with Sea Art XL and is intended to be used with that model (https://civitai.com/models/391781/seaart-furry-xl-10). Version for AutismMix posted that's intended to be used with that model (https://civitai.com/models/288584?modelVersionId=324524). Feel free to request if there are any other models anyone would like this trained for.