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psd stroked layer misaligned in Beta V1.7


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The attached psd file opens correctly in Affinity Ver 1.6, but in Beta V1.7, the second layer (black stroked) is shifted one pixel to the right and one pixel down. (None of the other layers in the original were visibly affected).

Interestingly, if even just this one layer is consolidated (Shift,Ctrl,Alt & E) into a new top layer in Photoshop, then Affinity Beta V1.7 displays it correctly aligned.

I have attached the Birthday Card consolidated.psd file. If you open this in Ver1.7 and switch the top (consolidated) layer on and off, you will see the affect of the incorrect shift in the stroked layer.

If Ver 1.6 can handle this correctly, then so should Ver 1.7.

Birthday Card consolidated.psd

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Note: the beta version have their own forum section for discussions, bug reports, etc. 

They can be found at https://forum.affinity.serif.com/index.php?/forum/32-affinity-beta-software-forums/

-- Walt

Windows 10 Home, version 20H2 (19042.685),
   Desktop: 16GB memory, Intel Core i7-6700K @ 4.00GHz, GeForce GTX 970
   Laptop (2021-04-06):  32GB memory, Intel Core i7-10750H @ 2.60GHz
, Intel UHD Graphics Comet Lake GT2 and NVIDIA GeForce RTX 3070 Laptop GPU
Affinity Photo 1.9.2.1035 and 1.9.4.1048 Beta   / Affinity Designer 1.9.2.1035 and 1.9.4.1048 Beta  / Affinity Publisher 1.9.2.1035 and 1.9.2.1024 Beta

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Hi Don - NZ,

Unfortunately your file looks the same to me in Photoshop, Affinity Photo 1.6 and 1.7 see attached comparison screenshots for each layer. Note I've drawn a 'pixel ruler' on each file. From the bottom edge up it is 58 pixels, and from the right edge in it is 60 pixels - this is the same on all 3 applications!

Photoshop:

PSD-1.thumb.png.35a7f47ec72394e7f2129deaadc013a2.png

PSD-2.thumb.png.54c0a68a8dab6337cee7225e1579fc69.png

Affinity Photo 1.6:

Photo1-6-1.thumb.png.506b7093e084912f820d2113899707b4.png

Photo1-6-2.thumb.png.7ff88ffd415f3b9bba2532d4d0faa0d4.png

Affinity Photo 1.7:

Photo1-7-1.thumb.png.a4bf6253f47e66f6afc38020293daf4e.png

Photo1-7-2.thumb.png.a1f41c6b30ca4c2afa16063142e0dd8e.png

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On 1/8/2019 at 11:01 PM, Sean P said:

Hi Don - NZ,

Unfortunately your file looks the same to me in Photoshop, Affinity Photo 1.6 and 1.7 see attached comparison screenshots for each layer. Note I've drawn a 'pixel ruler' on each file. From the bottom edge up it is 58 pixels, and from the right edge in it is 60 pixels - this is the same on all 3 applications!

Photoshop:

PSD-1.thumb.png.35a7f47ec72394e7f2129deaadc013a2.png

PSD-2.thumb.png.54c0a68a8dab6337cee7225e1579fc69.png

Affinity Photo 1.6:

Photo1-6-1.thumb.png.506b7093e084912f820d2113899707b4.png

Photo1-6-2.thumb.png.7ff88ffd415f3b9bba2532d4d0faa0d4.png

Affinity Photo 1.7:

Photo1-7-1.thumb.png.a4bf6253f47e66f6afc38020293daf4e.png

Photo1-7-2.thumb.png.a1f41c6b30ca4c2afa16063142e0dd8e.png

Hi Sean

Sorry for the delay, but the computer room suffered a water leak in the ceiling yesterday.

I have played around with this some more and it seems to me that it arises when a program has to decide how to map an image pixels to that of the screen dpi.  If you push the magnification high enough, then all three programs start to introduce a gray line of pixels somewhere on a stroke or outline - usually on the inside of the stroke/outline (but not always) as they make a decision about how to handle an image pixel to screen dpi relationship (that is not an exact match).

Even PS starts to show this around the 1400% magnification. 

Just when and where this appears, appears to depend partly on the screen resolution (mine is 2560x1400), the on-screen magnification and someone's decision on how to map image pixels to screen dpi.  I doubt we will ever get to the bottom of this, it is just unfortunate that whilst Ver1.6 doesn't exhibit it at my combination of settings and normal viewing levels, Beta 1.7 does.

I guess the real answer is to simply create any stroking or outlining again in the final program and just be thankful that Affinity has done such a good job otherwise in opening psds.

Please consider it closed and we will see what the final release does.

(PS How did you get the yellow and magenta chequering up)?

 

 

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Thanks for getting back to me! Indeed, if you've got vector stroke that exist on half pixels then you do start to get semi transparent pixels when they go out as a raster file. You could always try specifying your stroke size in pixels to avoid that?

Regarding the pattern, that was just drawing alternating pixels out to check measurements - no fancy tricks used! :) 

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