This tutorial shows how to create photo realistic renderings within Rhinoceros aka Rhino 3D. In this video, Cycles Renderer is demonstrated. If you find the video hard to follow, perhaps you may also want to watch Part 1 and 2 of this series.
Cycles is a cool new feature of Rhino 6. It sports realistic realtime rendering feedback and can also be GPU (Graphics Processor Unit or Graphics Card) accelerated for faster rendering time. It supports CUDA as well as OpenCl for GPU enabled acceleration.