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

[InternetTroll]

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!

[carl123]

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.

[Murfee]

Hi, it is due to colour decontamination of the pixels, James explains it in this post.

 

[InternetTroll]

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.

[Imaginary]

Well, I think the  "Refine selection" process needs a complete makeover: