rendering - What is "OptiX" and "OpenCL" in 2.81? - Blender Stack Exchange
Cycles Roadmap — Blender Developers Blog
E-Cycles speeds up Blender GPU rendering | CG Channel
Running OpenCL Cycles using Blender 2.71 & AMD GPUs | Anteru's Blog
Behind The Pixelary — CPU vs GPU rendering in Blender Cycles
AMD pays Blender at least $140,000 annually and after two years still no Vulkan support and Blender removes all support for AMD GPUs and optimized Blender for Nvidia exclusively. (Cycles X) :