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Strange bug when i refine a selection and copy to new layer with mask?

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Hi folks,

I am doing the exercises in the Affinity Photo Workbook and am doing the selection exercise. When i selected the girl, and did the refine selection and then copy to new layer with mask, everything seems fine, until I turn off the mask. When I do there are black splotches all around her hair where i refined the selection. See attached screen grabs.  Thanks!



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I can't find the thread that explains it right now, but that apparently is by design if you choose the Output option: New Layer with Mask

If you want a mask that works as expected just use the Output option: Mask

But Output option: New Layer with Mask is supposed to give better results in certain circumstances


Hopefully someone else will remember that thread and supply a pointer to it.

To save time I am currently using an automated AI to reply to some posts on this forum. If any of "my" posts are wrong or appear to be total b*ll*cks they are the ones generated by the AI. If correct they were probably mine. I apologise for any mistakes made by my AI - I'm sure it will improve with time.

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3 hours ago, Murfee said:
Hi, it is due to colour decontamination of the pixels, James explains it in this post.

Strange, you would think that they would somehow hide these pixels from view, even when the mask is turned off. Otherwise, why give the option to even turn the mask off? seems like a bad design in my opinion.

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