AI images are getting harder to spot, but physics still gives them away if you know where to look

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Through the looking glass: AI image generators have grown sophisticated enough to largely eliminate early tells like malformed hands or feet. However, image forensics experts recently began focusing on laws of physics that large language models do not (yet) understand, such as those governing light and perspective.

A study published in the journal Science explains that while modern image generators are rapidly improving, the models behind them remain fundamentally ignorant of how light and geometry work in the real world. Measuring simple details like reflections or shadows can still give away a fake photo – that gap, experts argue, is now one of the most reliable ways to distinguish authentic photographs from AI fakes.

Spotting a fabricated image used to be straightforward. Early generators mangled anatomical details, rendered text as gibberish, and...

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