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

[Stefan Werner]

His paper could also be of interest:
http://gruenschloss.org/msbvh/msbvh.pdf

-Stefan

> On 02 Apr 2017, at 16:28, Sergey Sharybin <sergey.vfx at gmail.com> wrote:
> 
> 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>
> wrote:
> 
>> 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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