How does the real-time ray tracing work in the computer 3D graphics?

Question

I have been hearing about the new types RTX graphics cards that can do ray tracing real time. I know how the light radiation works in real life and previously -unless you wanted a still ray traced image that took long time to calculate- you had to use computer trickery to render effects that simulate in moving 3D. Now with the new RTX-type graphics cards how close are we to how the real light works in real-time computer 3D space? Just how does it work?

In: Technology

Answer 1

The technique is very similar to rendered ray tracing. As with many rendering techniques, GPUs get fast enough and specialised enough that they can do the rendering in a 30th of a second or faster.