00:00Did you know GTA SIXS trailer hit 90 million views in 24 hours, and it wasn't a movie render?
00:07People assumed a supercomputer spent months on it.
00:11But Rockstar captured it running in real time on a PlayStation 5.
00:15The big trick is ray tracing.
00:18That means the computer follows each beam of light as it bounces.
00:22Light hits a red car, so red glows onto the wet street.
00:26Puddles reflect buildings, and ripple.
00:30You know that moment when you walk past a shop window in a game and see yourself?
00:34That's the baby version.
00:36Next trailer, check the puddles.
00:39Do they reflect you back?
00:41Next trailer you watch, check the puddles.
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