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2 votesDenis Rionnet shared this idea ·
This is a GPU bug. If you toggle the rendering mode with View > View using CPU — no border will get rendered, the PNG actually does not have it. The problem is known though.
An error occurred while saving the comment An error occurred while saving the commentDenis Rionnet commented
Same on Windows. Only happens when resizing.
Only workaround found: adding a 0px gaussian blur on objects having this issue, but it sucks.
The CPU / GPU view mode doesn't seem to affect the issue on PNG export (File > Export > Save for web).
However, I also noticed:
– "Type Optimized" gives better results than "Art Optimized" (although the issue is originally not type related).
– The issue depends very much on the exact export resolution. In my case, I export 1600x900 artboards to 1920x1080 PNG files, i.e. a 120% ratio, which seems to be the worst case. 110%, 121%, 130%, 150%... do not cause the same grey borders on coloured rectangles. Actually, in some cases, if I just add one single pixel to the export width (1921px rather than 1920), the unwanted grey line disappears. Or sometimes 121% rather than 120%.