Kray is a state of the art Global Illumination renderer that allows very fast and accurate rendering of scenes where indirect light plays important role. It includes advanced modern algorithms and optimizations that allow it to render full global illumination, reflections, refractions and caustics very fast even on standard computers.
It is currently available as a LightWave3D plugin and as a standalone application. It integrates tightly into LightWave3D and supports most of LightWave3D features and it's being constantly updated with new ones. However, Kray is not limited to LightWave3D architecture and provides you powerful features which are not available in LightWave3D like powerful tone mapping, instancing and linear workflow.
It is also very easy to port Kray render engine to any software via Kray SDK and KrayScript.