Re:Mitsuba – A physically based renderer
by bhouston on Friday August 21, 2015 @01:13PM
(#10098887)
A lot of production renderers use the CPU as well - most Dreamworks Animation and Pixar films are still mostly CPU-based rendered. I've used Mitsuba and it is pretty slow and incomplete compared to production renderers (Mitsuba's scene definition format is just brutal compared to Arnold or V-Ray or PRMan), but some of its results are not yet available in production renderers.
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Re:Mitsuba – A physically based renderer
by tomvbussel on Friday August 21, 2015 @02:04PM
(#10099204)
It's a bit unfair to compare the speed of Mitsuba with the speed of Renderman. Mitsuba only has a simple KD-Tree (although highly optimized), while RenderMan most likely has a state of the art BVH, which utilizes SIMD instructions. RenderMan also has a lot of sampling controls, while Mitsuba's path tracer has always traces one light and one BSDF sample on each intersection. There are multiple software engineers at Pixar that solely focus on optimizing RenderMan, while most of Mitsuba is implemented by a single person, who is a full-time researcher.