When we play a PC game, we usually feel that the scenes are not real because now real-time picture system can not simulate nature environment very well. Ray tracing is a simply way to make picture “real”, but it need more calculations and now it can not generate real-time images on commodity computers.
However, there are some experiment system try to use ray tracing in real time system. Intel did a lot of works on it. Intel demonstrate “Quake Wars: Ray Traced” on a 16core cpu system with larrabee hardware, a separate video card system Intel planned. Intel also has a “Wolfenstein ray traced” project shows fantabulous real time image powered by 4 servers. (http://www.youtube.com/watch?v=XVZDH15TRro)
It looks we might play a PC game with ray tracing algorithms within 2 – 3 years. I hope.
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