There may be depth within those virtual worlds, but it's not presented that way to our eyes. Even the lively four-dimensional worlds of computer gaming still squash themselves against the screen. All of our screens live in Flatland – everything projected onto a surface of zero depth. But, as I noted in the closing paragraphs of that feature, capturing depth does not mean that you can display it. That's enormous progress – a real revolution in sensors that gives our devices the capacity to capture depth. Today, I can fire up an app on my whizzy new iPhone 13 Pro, point its onboard LiDAR sensor at a subject, and record – in four dimensions – and in real time. At the time, the tech required an array of tens to hundreds of cameras, all pointed inward at a subject, gathering reams of two-dimensional data immediately uploaded to the cloud for hours of post-processing, image recognition, feature extraction, and assembly into three- or four-dimensional media. Review Four years ago in a feature for The Register, I wrote about the latest technologies for three-dimensional photography and videography.
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