Arion (software)
Arion is a physically based, unbiased render engine developed by RandomControl. Versions
Arion standalone is a general purpose rendering tool with a visual UI. There are also versions that integrate into 3ds Max and Rhinoceros. See also
 POV-Ray - A historical raytracer. Octane Render - A commercial unbiased GPU-accelerated renderer. Sunflow - An open source unbiased renderer. YafaRay - An open source raytrace renderer. References

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Rendering systems