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It doesn't make a stereo image pair though, does it? Wow, I do see that it has an option to capture audio, I had no idea that was there. Default off though.

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It does. As I said, the gallery offers a cardboard style stereo view. The 2nd image is hidden in the jpeg file, just like the mp4 audio, and can be extracted using exiftool.

You sure? I just checked a panorama I took last month and the file does not contain the second image as far as I can tell using exiftool. I see the Cardboard viewing feature in the Photos app, however that doesn't mean the image is necessarily stereo. It looks to me like it's just displaying the same image for both eyes, rendered on the inside of a sphere at some default viewing distance.

It would surprise me if Google left the stereo feature enabled when it would double file sizes for something 99% of people would never use. But it would be nice if an option to enable it was exposed.

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