Photo: Graphical error that causes lines to appear between image elements when no gap actually exists

[AffinityRoger]

I've provided an example document and a video showing the problem.
In the example I have four textured green squares snapped next to each other (no gap between them at all) but at various zoom levels white horizontal/vertical lines appear between them.
These lines don't show on an exported image, it's just an issue whilst editing.

I'm on Windows 10 with the latest updates, a Nvidia graphics card, hardware acceleration is on and I'm using the latest version of Affinity Photo (2.5.7)

 

 

affinity photo test.afphoto

affinity photo test.afphoto

[NathanC]

Hi @AffinityRoger,

These thin lines are a by-product of anti-aliasing that is applied by default to objects, the tutorial post from NMF linked below explains more and also provides two methods to remove these lines.

 

[NotMyFault]

In this case it is minimally different. the file contains bitmap layers, not vector layers, so antialiasing is not in play, but resampling. Both behave similar, but are managed separately in Affinity apps.

The thin lines depend on zoom level. There are not rendered at 100% or integers multiples.

in case of other zoom levels, the rendering seems to generate an exactly 1px (screen resolution, not document rendering) seam line. In my view this is an actual rendering bug, independent from the antialiasing issue which is more a missing feature - because it doesn’t affect exports (at document resolution).

There is no need to apply any corrective action. Unless you intend to export at a different resolution.

[AffinityRoger]

5 hours ago, NathanC said:

Hi @AffinityRoger,

These thin lines are a by-product of anti-aliasing that is applied by default to objects, the tutorial post from NMF linked below explains more and also provides two methods to remove these lines.

I'll check out NotMyFault's post, thanks