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> I do this frequently when I want to take a photo through a window.

I feel really dumb for not having thought of this.

I see, yeah good point. Perhaps the lack of reliable depth data also be baked into some signed metadata property. Wouldn't tell you definitively if something were fake, but could be a context clue if a particular photo were dubious I suppose.

What they could do instead is record a video while taking a photo, the subtle movements (at least if handheld) might have enough information to get an approximation of depth (parallax).