Affinity Photo v2.3.1: Fringe lines appear between snapped and overlapped objects

[Sirax]

Please check the attached Photo project for reference.

It contains rectangles with no line style filled in colours. Some of these rectangles are overlapped and blended. So, you can play with different blending modes, however, the problem remains the same - the rectangles are not borderless, as expected, and some pixels passthrough the layers and create undesirable fringe lines.

Kind regards.

Blending Modes Playground.afphoto

[GarryP]

Welcome to the forums @Sirax

Your document units (UOM) is set to Millimetres.

Changing it to Pixels shows that your layers are not aligned to the pixel grid and have non-integer positions and sizes.

Because of that there will be problems with overlaps and ‘underlaps’ where the software has to 'invent'' extra pixels to cope with the 'fractional pixels'.

If you want perfect pixel alignments the best thing to start with is having integer pixel values for all the X, Y, W and H values of all of your layers.

[Sirax]

7 minutes ago, GarryP said:

Welcome to the forums @Sirax

Your document units (UOM) is set to Millimetres.

Changing it to Pixels shows that your layers are not aligned to the pixel grid and have non-integer positions and sizes.

Because of that there will be problems with overlaps and ‘underlaps’ where the software has to 'invent'' extra pixels to cope with the 'fractional pixels'.

If you want perfect pixel alignments the best thing to start with is having integer pixel values for all the X, Y, W and H values of all of your layers.

Good point that should be considered! Actually the workaround in my case is to resize the document back to pixels and then again to mm for precise printing. But, anyway, thank you for this clarification.