Caustic Graphics ray traced global illumination demonstration

[Stefan]

No one has ever shown such a complex demonstration of true interactive GI using a GPU or CPU implementation. 
Why? Because GPUs and CPUs are not architected to fully solve the ray tracing problem efficiently. 
The CausticRT platform addresses these deficiencies and enables GPUs and CPUs to shade with an efficiency comparable to rasterization.

Read full story at PCPER.