AMD is apparently interested in supporting open-source, professional graphics. For instance, the Blender Foundation is interviewing potential hires based on a potential deal with the CPU and graphics vendor. They have also open-sourced a bunch of technologies through their GPUOpen Initiative, such as the Radeon Rays (formerly FireRays) library.
This time, at IFA 2016, they released the Radeon ProRender, which used to be called FireRender. This is a plug-in for multiple 3D applications to render high-quality, raytraced images. The open-source, third-party renderer is currently available for 3D Studio Max, in beta for Maya, Rhinoceros, and Solidworks, and coming soon for Blender. While Cycles is pretty good, the potential for cross-pollination is interesting for the future of open 3D development.
We can't go wrong with more options.