Also use alpha channel from img2img input image as mask #124
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If you add an image with an alpha channel to img2img, it is also used for masking. This lets you do the masking with a proper image editor instead of the terrible Gradio one.
Any pixel with any transparency is treated as part of the mask, so partial transparency doesn't create a partial mask. But it is useful for editors that do not save color information in completely transparent areas.
If you use both an alpha channel and the Gradio mask they are combined.