Negative str values make boobs smaller.

Positive str values make boobs bigger.

Likely not as useful for for I2V, since WAN's I2V is first-frame based.

I recommend using both High and Low noise LoRAs for best results. If you only use one, I suggest using the high noise.

On-Site generation is unreliable, as Wan2.2 LoRAs cannot be used with it appropriately.