I finally caved and bought a $200 'AI art assistant' subscription and it basically just draws extra fingers.

3 comments

3 Comments

Yeah, the extra fingers thing is a classic sign you're using a base model without enough fine-tuning. In my experience, you need to use really specific negative prompts like "deformed hands, extra digits, six fingers" in every single request. It's a pain but it helps.

ramirez.blair1mo ago

Guess @abby308's next prompt will be "a hand model with a normal number of fingers.

andrew_miller901mo ago

Actually the extra fingers thing isn't just about lacking fine tuning. It's a well known artifact of how diffusion models work with hands in general. The models struggle with hands because they're small relative to the image and have a ton of complex joints and overlap. Even with good negative prompts you'll still get weird thumbs or fused fingers sometimes. The real trick is using things like ControlNet or openpose to explicitly map out hand positions. Still not perfect though.