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David Kup avatar image
David Kup asked ·

Why is Arnold too slow comparing to other CPU renderers ?

I even don't mention to GPU renderer. All other CPU renderers I know are faster than Arnold. Even faster than 3, 4 times. Like Vray next, renderman 22.3, Corona, Mantra. All of them are much faster than Arnold with same quality. And people are moving to others day by day. Why ? Why doesn't Developers focus to speed ? I hope Deveplovers and Direction know this situation and get reasonable Roadmap. Thanks so much !

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Tomas Kollar avatar image
Tomas Kollar answered ·

Arnold is slow ? Then you never worked with Maxwell...

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Heribert Raab avatar image
Heribert Raab answered ·

I am using most of the renderer in production in past years. I found out nothing is slower then Mantra, it outdated, that why sidefx will release Karma to replace it. renderman22.6 has a similar speed like Arnold. Corona and Vray are faster because of its "biased" rendering. the whole point of "biased" rendering to be faster then "correct inbiased" light tracing, but the setup is more complicated, you need to know the renderers optimization techniques to maintain the quality.

also, you have to keep in mind, some techniques are better or worse for different kinds of scenes. Indoor scenes or Caustics are very bad with Eye Pathtracer like Arnold or Renderman. Vray/Corona is fast because it uses light caches, photomapping. etc to help it out. the best solution would be a bidirectional path tracer or MTL like renderman-unified integrator or indigo renderer.


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Christoph Schaedl avatar image
Christoph Schaedl answered ·

In complex animated scenes the speed comparison isnt that much of a difference. And speed isnt the only reason to choose a render.

But i agree it could be faster.

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