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km.au

Pure white Alpha mask changes blend ranges?

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This is for Affinity Photo.

If one is to use blend rages, I can adjust the sliders to get what I want.

Why is it that when I add an Alpha mask (pure white) the entire image changes? This shouldn't happen if alpha mask is pure white no? There is no reason?

You can't workaround it either by putting blend ranges into a group and masking the group.

Is this a bug? Doesn't happen in Photoshop. Thanks.

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Maybe explain how the file is laid out or upload it 


iMac 27" Late 2015 Fully Loaded, iMac 27" Mid 2011 both running High Sierra 10.13.6 - Affinity Designer/Photo & Publisher - Illustrator CC, Inkscape, Blender, Sketchup, Pepakura Designer, MTC, Pixelmator & Pixelmator Pro + more... XP-Pen Artist-22E, - iPad Pro 12.9 B|  

Affinity Help - Affinity Desktop Tutorials - FeedbackInstagram & Flickr

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On 10/12/2019 at 3:51 AM, km.au said:

Why is it that when I add an Alpha mask (pure white) the entire image changes?

What specifically are you adding a mask to? What does it change & how does it change it?


Affinity Photo 1.7.3, Affinity Designer 1.7.3, Affinity Publisher 1.7.3; macOS High Sierra 10.13.6 iMac (27-inch, Late 2012); 2.9GHz i5 CPU; NVIDIA GeForce GTX 660M; 8GB RAM
Affinity Photo 1.7.3.155 & Affinity Designer 1.7.3.1 for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 13.1.2

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Ok, here's what I want the blend to look like:

Note the alpha mask is off

439665497_2019-10-1411_23_46-BlendOptions.thumb.jpg.ff0a94b1fa81c0e0eb0f56e14593a190.jpg

 

As soon as I turn a pure white alpha mask on, the entire image changes and the blend is wrong.

 

1555321160_2019-10-1411_24_50-BlendOptions.thumb.jpg.7fa9cd31a0d57edbf0c4636a742ef19b.jpg

 

Just trying to understand how this should occur as an alpha should not effect RGB pixel blend like this?

Untitled.thumb.jpg.bac56bb5dae40e1559f6c06a19639dcd.jpg

 

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