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Posted

Hi there,

I'm currently working on a project and clear cutting a bunch of paper scraps and other objects.... I'm doing this in Affinity Photo by selecting the area and creating a mask, works well but once I place the image onto Designer or Publisher there a ghost around the image about 1 pixel wide its remnants of the original image.

Please see video attached.

Why is this happening? Am I doing something wrong? Is there a better way?

Thanks team, appreciate any help.

 

Posted

Hi,

based on the video, i try some wild guesses:

  1. A temporary line while move tool active, not visible in exports (or merge visible)
  2. you may have scaled the placed image, leading to fractional pixels at the edges leading to unwanted anti-aliasing at edge pixels
  3. Color format conversion issues (e.g. Photo in RGB, Publisher in CMYK)

It would help if you can provide the sample file to reproduce (Photo input and publisher result, and export)

Mac mini M1 A2348 | MBP M3 

Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.

 

Posted (edited)
3 hours ago, ra.skill said:

Attached below is the uncut original image in Affinity Photo which came from Unsplash.

Also attached is the Designer file with my cut version embedded and where you can see the ghosting around edge.

Thank you for providing the files.

Here are my 2 cents about the possible reason for the ghosting:

  1. surrounding to the clipped canvas, there is still a lot of non-trimmed remaining background. You can see it if you increase the canvas size.
  2. Your document uses mm instead of px, which could lead to fractional pixel-sizes (when converted from mm to px).

Combined, these issues could lead to anti-aliasing and create 1-2 pixel wide line ghosting in from the invisible pixels outside the clipped canvas.

Possible solution :

  • In the embedded document, reduce the canvas size by a few px in both axis.

This removed the ghosting in the document.

I agree with you and @Lagarto that the behavior of Affinity apps is not optimal, but I'm unsure to call this a bug. There is issue afp-4537 maybe related, where layers larger than the cropped canvas where used in combination with masks (or adjustments with inherent masks), see

 

image.thumb.png.e7c5a202f6a93504e6fb88c5a27357cd.png

Edited by NotMyFault

Mac mini M1 A2348 | MBP M3 

Windows 11 - AMD Ryzen 9 5900x - 32 GB RAM - Nvidia GTX 1080

LG34WK950U-W, calibrated to DCI-P3 with LG Calibration Studio / Spider 5 | Dell 27“ 4K

iPad Air Gen 5 (2022) A2589

Special interest into procedural texture filter, edit alpha channel, RGB/16 and RGB/32 color formats, stacking, finding root causes for misbehaving files, finding creative solutions for unsolvable tasks, finding bugs in Apps.

I use iPad screenshots and videos even in the Desktop section of the forum when I expect no relevant difference.

 

Posted

Thank you both @Lagarto & @NotMyFault for looking into this.

I'm glad you guys are also able to recreate my issue, it means it's not just me.

I do feel this is a bug that needs fixing... I'm aware that there's still remaining non-trimmed background around image and that this is essentially what's bleeding through around edge... but isn't this the whole point of masking off an area? 

This function of masking/clear cutting an image and removing background seams like the most basic use of Photo, it's far from advanced so I'm surprised this issue exists and that no one has commented on it before.

I've tried multiple different photos but problem still exists.

I've checked image is cropped correctly, problem still exists.

I've ensured RGB and CMYK is matching between Photo and Designer/Publisher, problem still exists.

I've ensured unit of measure px or mm is matching between Photo and Designer/Publisher, problem still exists.

The workaround for this easy I know... when placing into Designer/Publisher I've basically been putting the images into a picture frame that is a slightly smaller in order to crop off this edge... but I shouldn't need to do this. I've been doing this kind of workflow in PS and Ai/ID for years and never had this issue.
Is my idea of masking like this wrong? Should I be doing this another way??

Appreciate any more help or comments.
Perhaps this should be logged as a bug?
Thnx

Posted (edited)

@Lagarto I'm still getting the same result even when I "rasterize & trim" the image before masking??

It's almost as if there is a feather being applied to frame?

Correction...
Problem is fixed when I "rasterize & trim" the whole document after masking.

But sadly this defeats the whole "Non Destructive" workflow that Affinity prides itself on.

Edited by ra.skill
adition
Posted
2 minutes ago, Lagarto said:

Do you mean reproducing the same that I did on the video

Sorry I added an amendment to above comment, maybe you didnt see.

If I rasterize and trim whole image, including mask then the ghost edge disappears... but sadly this is "destructive".

  • 1 year later...
Posted
10 hours ago, MC909 said:

@ra.skill did you ever find a solution to this? I've had to do a lot of collage work this week in Affinity photo and it is incredibly frustrating having to manually remask the boundaries of every layer. I've tended to avoid Photo for this kind of work but I'm searching on here to see if this is user error and I'm too used to how other apps handle this.

Hi there,

im trying to remember the outcome of this??….

Unfortunately I don’t think there was any fix or better way to prevent this happening. 
 

I ended up having to do a clipping mask on all the objects just to remove the 1pixel ghost, very annoying. I’m surprised this hasn’t been fixed by now. 
 

Sadly I gave up on affinity and went back to adobe a couple of years ago. I love 90% of the AF suite but the missing 10% kills it for me, bugs like this one which seam super simple and easy to fix, plus other missing features that are essential to me. 

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