Maybe larger (640*704) training images are not better than normal (512*512 or 512*640)... At least I tested for hours and outputs are not satifying enough.Maybe set your resolution around 640*704 before (or without) Hires.fix would help get better results.

Kasumi Arimura 有村架純

Try again and again. This updated one is trained on more head images to improve outputs. Paid more attention to the setting of training steps as well. Weighted around 0.8.

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