LuxRays is library dedicated to accelerate the ray intersection process by
using GPUs.

Uses a Data Parallel Model: it doesn't reduce the time spent to trace a single
ray but it is able to trace many thousands of rays in parallel.

Supports Hybrid CPU/GPU mode where only the ray intersection task is off load
to the GPUs while everything else run on the CPU and can be written with usual
tools and languages.

WWW: http://www.luxrender.net/wiki/LuxRays