# Ray tracing

<https://en.wikipedia.org/wiki/Ray_tracing_(graphics)>

Not in OpenGL: <http://stackoverflow.com/questions/3667218/ray-tracing-in-modern-opengl-where-do-i-begin>

Closed source implementations:

- <https://en.wikipedia.org/wiki/OptiX>, NVIDIA

Open source implementations:

- <https://embree.github.io/> <https://github.com/embree/embree>

## Hardware implementation

<https://en.wikipedia.org/wiki/Ray-tracing_hardware>

Imagination bought Caustic in 2010 from ex Apple engineers. CEO mentions it in 2015 interview: https://youtu.be/7rpXL8TFLlw?t=1701
