This image was generated by using the following prompt:
Prompt: Smiling beautiful woman, ponytail.
Negative prompt: (worst quality, low quality, normal quality:1.8).
Use ‘Quick selection tool’ to select the character.
Click the Mask icon to add a new mask.
The outline is choppy. Let’s fix that.
Fill with Black and White like so, and click ‘Channels’.
Create a new channel, click to any of the channels above and press [Control + A] to select all, [Control + C] to copy. Go to the newly created channel, and press [Control + V] to paste like this.
Go to [Filter -> Blur -> Gaussian Blur] to blur the image.
Go to [Images -> Adjustments -> Levels] to create a smooth outline.
This is the end of the tutorial. 🙂