[Bf-committers] GSoC 2017 - Cycles Motion Blur Improvements

Sergey Sharybin sergey.vfx at gmail.com
Sun Apr 2 16:28:22 CEST 2017

Hi again, and sorry for the spam.

Totally forgot about one more moblur-related project: moblur support for
volumetric data (smoke, fire, clouds, tornadoes..)

On Sun, Apr 2, 2017 at 4:20 PM, Sergey Sharybin <sergey.vfx at gmail.com>

> Hi,
> 1. Guess the technique is called Sampled motion blur, combined with the
> importance sample over the camera shutter time.
> 2. I do not see how those algorithms are connected to motion blur and also
> not clear which exact algorithm you're referring to. Is it a generic
> quesiton or you see how this is applicable for motion blur?
> 3. I'm not aware of algorithms which could improve motion blur in Cycles,
> but there are lots of rather technical tricks you can do to reduce render
> time and motion blur looking better:
> - Some adaptive criteria for motion blur steps, so we don't do steps in
> BVH for cases when something barely moves
> - Use traverse-time interpolation of motion BVH nodes (or at least
> investigate whether this gives and improvements)
> - Support multi-step object motion blur
> - Support curved/scale motion blur
> On Sun, Apr 2, 2017 at 9:43 AM, Natalevich Mikhail <natalevichmv at gmail.com
> > wrote:
>> Good morning.
>> Thanks to LetterRip for providing useful papers. I would lke to know more
>> about Cycles motion blur to be able to work on it, so have a few
>> questions:
>> 1. What algorithm is used in Cycles for motion blur now?
>> 2. Is it good enough to use the algorithm decsribed in the paper (link on
>> jcgt.org <http://jcgt.org/published/0003/01/02/paper.pdf>) for the
>> improvement of Blender?
>> 3. Do you know even better algorithms? (I will, of course, examine this
>> topic comprehensively later, but there's not enough time before the
>> deadline)
>> Thank you in advance,
>> Michael Natalevich
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> --
> With best regards, Sergey Sharybin

With best regards, Sergey Sharybin

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