512x512 image for AppStore (iTunes Connect), will Apple do corner rounding like they do on the phone?

Question

Upon submission of an iPhone app to iTunes Connect for AppStore distribution, they ask for a 512x512 pixel image. Here is what it says next to the place to submit it:

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Answer 1

Apple will indeed round the corners of the flat artwork uploaded to iTunes Connect. It will also add a gloss automatically. So you can upload just the square flat version, but an already rounded version will also work just fine.

If your icon already includes gloss, you can add the UIPrerenderedIcon key to your Info.plist. If you use the build in plist editor of Xcode, the full name of the key is Icon already includes gloss effects and you must set it to YES. iTunes Connect will honour the settings in that file and will update the preview of your uploaded artwork after you upload your binary.

Important: Make sure the UIPrerenderedIcon key is in the root of your Info.plist, otherwise the icon uploaded to iTunes Connect will still use the default gloss, because it will not recognize this key.