With the integration of Radeon™ ProRender, Cinema 4D is the first commercial 3D application with an integrated GPU path-tracing renderer based on the OpenCL open standard
AMD developed Radeon ProRender as a modern uni-directional pathtracing renderer, which provides unbiased rendering, and features GPU-acceleration. Being based on OpenCL™, it allows users to render on graphics cards produced by different manufacturers. This flexibility was one of the reasons for AMD and MAXON to team up and integrate Radeon ProRender natively into Cinema 4D, which will begin with the launch of Release 19.
For Cinema 4D users who already create materials completely reflectance-based, there will be no difference regarding workflow, so they immediately benefit from the huge speed boosts Radeon ProRender enables in render time. For other users, it is important to understand what the physically-based workflow is, and how to use it.
The central idea of the physically-based workflow is use those lighting set-ups, materials and camera configurations which are based off physics principles. This could involve the use of real-world measurements, for example setting a light to use its real-world temperature value in kelvin. The goal is to simplify rendering by leaving the physics to the renderer, and allow the artist to set a few, sensible settings on material and lights. This enhances artists’ workflows by freeing them from having to tweak parameters to get great renders, and allows quickly producing a render which becomes virtually indistinguishable from a photograph.