There are so many choices in renderers these days and GPU rendering is a favorite lately. ProRender, and developed by AMD, and is the new Open CL-based GPU/CPU-based rendering engine.
Radeon ProRender is a high-quality, fast, accurate, physically-based renderer. It’s now integrated right into Cinema 4D, bringing interactive rendering, a PBR workflow, and bucket rendering.
The reasons for choosing any GPU renderer should be realistic results and speed. The heart of rendering with ProRender is not hardware but its physically-based rendering workflow.
The main idea of this workflow is to limit the render to lighting set-ups, materials and camera configurations that could exist in the real world, including measurements, aiming to bring the rendering of physical simulations of light and matter as close as to reality possible. The advantage is a render to work from that matches reality, and looks very similar to a photograph.
The heart of rendering with ProRender is not hardware but its Physically-Based Rendering workflow.
However, the workflow won’t need to change very much to achieve speed increases from Radeon ProRender at render time. I could even use Cinema 4D’s material editor with Radeon ProRender in the same way that I always have.
PBR material and workflow
Instead of the colour channel, this new material uses Cinema 4D’s reflectance channel, with one of the physically accurate diffuse surface models as the base layer.