Rasterizing Image layers blurs them

[Alex_M]

There's still this bug that blurs Image layers when I rasterize them. This happens only if I have an Unsharp Mask layer in the layers panel.

Please check the attached screenshots. Notice how the Image layer's dimensions and coordinates change when I rasterize it. This doesn't happen if I delete the Unsharp Mask layer before rasterizing. I'm using Photo version 1.8.4.693.

[Gabe]

Hi @Alex_M,

Thanks. Issue logged, 

[David in Яuislip]

FWIW I can replicate that, however Rasterise & Trim doesn't cause the Transform shift

Even weirder, if you place the Unsharp mask below the image then the shift doubles!

[Alex_M]

Hi,

Any progress on this issue? The bug is still present in the newest version 1.9. It's been present in Affinity Photo for almost 2 years now.

[telemax]

I found some dependency.
This happens if the canvas size equal to the image size.
If the canvas is larger than the image by ≈100 pixels, or more, no blurring occurs.

[Gabe]

I'm afraid I don't have any news on this. Sorry  

[Alex_M]

Hi @Gabe,

Any updates on this? I am still facing this issue on a daily basis, sometimes costing me a lot of work because I didn't know a layer got blurred along the way. This is a serious issue which has gone unfixed for a year and a half now. I'm astonished that this bug has not been fixed yet. Why is nothing being done on this?

[GarryP]

As mentioned by David above, using Rasterise & Trim doesn’t seem to give the unwanted result (although it does have other effects).
Is there a reason why you can’t use that functionality instead?

[Alex_M]

I don't want to trim my layers when rasterizing them. I have to keep them intact.

BTW, no official response from Serif?

[walt.farrell]

51 minutes ago, Alex_M said:

no official response from Serif?

Generally there is no response on when bugs will be fixed. You will know it's fixed when there's a beta or official release that indicates it in the release notes, and/or this topic is marked as resolved. All that @Gabe or anyone in the Serif QA or Support teams will be able to say is that it's still not fixed, until it is fixed. They do not know the schedule, and can't really influence it.

[NotMyFault]

The issue might be unfixable without doing severe collateral damage or breaking backward compatibility.

As of today,

• blur filter and sharpen filter affect RGB and alpha channel
• you can’t select to wich channels a live filter gets applied (see feature request)
• blurring increases the size of an object by fractional semi-transparent pixels
• these (undesired) extra pixel increase the layer size, resulting in fractional pixel positions, which then lead to unwanted blur effect of rasterize operation.

Just click „unclip canvas“ to that the damage is done unrelated (before) rasterize.

So to solve the issue, Affinity could implement updated live filters where you can deselect the alpha channel.

The damage even starts if you deactivate the live filer.

[David in Яuislip]

22 hours ago, Alex_M said:

don't want to trim my layers when rasterizing them. I have to keep them intact.

Ok, try this, my very best workaround kludge:
If the Unsharp Mask is grouped by itself then rasterising the Image Layer works properly
Select the Image Layer, which must have the USM layer immediately above, and run the macro

RasteriseImageLayer.afmacro

[David in Яuislip]

18 hours ago, NotMyFault said:

Just click „unclip canvas“ to that the damage is done unrelated (before) rasterize.

Yes I discovered this during testing the macro attached above and unclipping after it had finished. What I didn't realise until later was that the damage is done as soon as the USM live layer is applied. So let's play a game:

New 800 x 600 document
Place 800 x 600 image in the centre
Add USM live layer radius 3, factor 3, threshold 0 as child of image
Unclip, canvas dimensions change to 806 x 606
Unclip again, no change

New 800 x 600 document
Place 800 x 600 image in the centre
Add USM live layer radius 5, factor 3, threshold 0 as child of image
Unclip, canvas dimensions change to 810 x 610
Unclip again, no change

New 800 x 600 document
Place 800 x 600 image in the centre
Add USM live layer radius 3, factor 3, threshold 0 layer above image
Unclip, canvas dimensions change to 818 x 618
Unclip again, canvas dimensions change to 824 x 624
Unclip again, canvas dimensions change to 830 x 630

New 800 x 600 document
Place 800 x 600 image in the centre
Add USM live layer radius 5, factor 3, threshold 0 layer above image 
Unclip, canvas dimensions change to 830 x 630
Unclip again, canvas dimensions change to 840 x 640
Unclip again, canvas dimensions change to 850 x 650