Continuing the theme from the Game Developers Conference this year, Epic Games in collaboration with ILMxLAB and NVIDIA are showing off real-time ray tracing in the Unreal 4 engine. The demo is powered by NVIDIA's RTX technology for Volta GPUs, which itself is powered by Microsoft's DirectX Ray Tracing API, or DXR. Wow, by the time the GDC is over every ray will be traced. I have to say, this is the best looking demo of the tech I have seen so far. "Ray tracing is a rendering process typically only associated with high-end offline renderers and hours and hours of computer processing time,” said Epic Games Founder and CEO Tim Sweeney. "Film-quality ray tracing in real time is an Unreal Engine first. This is an exciting new development for the media and entertainment linear content worlds—and any markets that require photorealistic visualization."