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Trained on 31 photos (face & full body)
Trained at 768 resolution, so 768x768 inpainting works great
Prompts: "Smiling" and others are trained into the Lora. For a full list of the prompts/captioned used for training, check the Lora file's metadata in your webgui.
txt2img: A weight of 0.6-0.7 will give the best mix of likeness and flexibility.
Inpainting: A weight of 0.7-0.8 will give the best low-noise likeness. If you want the absolute best likeness, switch your checkpoint to SD15 since that's the model on which it was trained.
Face restoration: isn't usually necessary, but I recommend setting your face restoration strength inside auto1111 settings to something like 0.7-0.8 which makes the effect less than the default setting of 0.5.
The checkpoint you use can heavily influence the likeness of a celebrity Lora. I train my Lora's on SD15, so you'll get the best likeness on any model that used SD15 as the base model. See this example for how a checkpoint can influence the look of a Lora.