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  • Are there some systems where you cannot decide how to render images, and just renders them based on how many pixels in size the images are? Commented Oct 26, 2021 at 17:35
  • @user16217248 I expect there is a really dumb system somewhere that does that. But anything that someone has taken some care over will handle differing size icons properly. Commented Oct 26, 2021 at 22:50
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    MacOS and iOS will scale whatever image needs the least amount of scaling. Plus you can have different point sizes with different resolutions. For example 32x32x3 (designed for 32x32 size with 3 pixels per point) vs 48x48x2 (designed for 48x48 points with 2 pixels per point). Commented Oct 30, 2021 at 13:23