I've been struggling to create pixel perfect artwork using the new Larger Canvas Format launched in version 24.2 of June this year. I can't reproduce the problem when using the regular sized canvas whereas the problem occurs every time when using the larger canvas format.
Here is how to test/ recreate the problem:
I create 3 rectangles (2 px height, 100 px length) with only fill and no stroke. When I zoom to max to view them using pixel preview they appear as they should with no bleeding (see the LEFT side of the attached image) but when I export for screens & bring the png back in there is overlap/ bleeding (see the RIGHT side of the attached image).
I've set the reference points for all artwork & artboards (I have a few) to the top left and taken every step to ensure that everything in the project is pixel perfect including ensuring that all positions are in whole pixels (no fractions).
I'm using global rulers (not artboard rulers).
If I want to avoid the overlap/ bleeding between pixels I must use a regular sized canvas and yet a regular sized canvas isn't wide enough for my project. Dead end?
As I'm programing LED props (each pixel is 1 LED) even 1 px difference becomes a very visible problem. Thanks for any further ideas/ solutions.
ps. The problem appears when using CC Libraries and viewing in PS so it doesn't seem to have to do with the export for screens option.