POV-Ray : Newsgroups : povray.general : Efficient Motion Blur Server Time
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From: Chris Huff
Subject: Re: Efficient Motion Blur
Date: 18 Oct 2000 21:34:46
Message: <chrishuff-771AA0.20373218102000@news.povray.org>
In article <39ee2436@news.povray.org>, "Rune" <run### [at] inamecom> 
wrote:

> "Chris Huff" wrote:
> > If you have an animation, that is.
> 
> Quote from my original message:
> "How do you make motion blur in animations as fast as possible?"
>                              ^^^^^^^^^^^^^

I guess I really need to keep the subjects straight...you are right, of 
course.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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From: Margus Ramst
Subject: Re: Efficient Motion Blur
Date: 18 Oct 2000 21:49:29
Message: <39EE4376.BB82F788@peak.edu.ee>
Warp wrote:
> 
>   I think that internal motion blur is always faster unless all the scene
> is moving. This is because only part of the image has to be extra-calculated
> instead of the whole image (as happens when using the external method).
>   If all the scene is moving, then both methods may be as slow.
> 

However, internal motion blur (as implemented in MegaPOV) uses more memory -
often significantly more.
And if the whole scene is moving, I'm pretty sure the frame averaging method is
somewhat faster, since there is no additional overhead of checking the
time-stamps.

-- 
Margus Ramst

Personal e-mail: mar### [at] peakeduee
TAG (Team Assistance Group) e-mail: mar### [at] tagpovrayorg


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From: Peter Popov
Subject: Re: Efficient Motion Blur
Date: 19 Oct 2000 04:48:14
Message: <86dtusojbt28f4ujvbq7b8kpjebd7ckmub@4ax.com>
On Wed, 18 Oct 2000 21:29:18 -0400, John VanSickle
<van### [at] erolscom> wrote:

>Hey!  I used POV-Ray to average the frames output by POV-Ray.
>Does that count as a third method?

Same here. I even posted some code to do it IIRC. And Bill Marrs said
it was legal for the IRTC so you're safe there.


Peter Popov ICQ : 15002700
Personal e-mail : pet### [at] usanet
TAG      e-mail : pet### [at] tagpovrayorg


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From: Rune
Subject: Re: Efficient Motion Blur
Date: 19 Oct 2000 05:59:00
Message: <39eec5e4@news.povray.org>
"John VanSickle" wrote:
> Hey!  I used POV-Ray to average the frames output by POV-Ray.
> Does that count as a third method?

No. The difference is if the motion blur is done IN the calculations of the
images or AFTER the calculations of the images. Which program is used
doesn't matter.

Rune
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