Re: help with motionblur optimizations - alternatives?

["Tim Leydecker" <BauerOink(at)gmx.de>]

Hi Kim,

I would have thought I could use the projection planes by disabling
the "Lock aspect ratio" attribute and resetting the Film aperature to
a value that´d fit my new outputformat, but it´s inches only. Makes
it a bit difficult to calculate from something like 768x432 (16:9) to
800x480 (4:3). Maybe I´m missing something obvious and could
simply change the output format to that. I´ll need to test that out.

I´d really welcome if you´d want to share your script, all I´ve found
in the docs is this:

     Horizontal FOV
    w = film width in mm (e.g., 36) (= h * aspect ratio)

     d = lens focal distance in mm (e.g., 50)

     Horizontal FOV = 2 * atan( ( 0.5 * w ) / d )

     Vertical FOV
    h = film height in mm (e.g., 24) (= w / aspect ratio)

     d = lens focal distance in mm (e.g., 50

     Vertical FOV = 2 * atan( ( 0.5 * h ) / d )


Don´t know if this would get me in the right direction but would gratefully
skip putting work into that if you have invented the wheel allready...

Cheers

tim



----- Original Message ----- 
From: "kim aldis" <kim(at)aldis.org.uk>
To: <XSI(at)Softimage.COM>
Sent: Monday, June 05, 2006 12:05 PM
Subject: RE: help with motionblur optimizations - alternatives?


> Just increase FOV. If you want to do it pixel accurate I have a script that
> calculates a new fov based on a pixel count input, but it's only a bit of
> arithmetic.
>
> > -----Original Message-----
> > From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> > Behalf Of Tim Leydecker
> > Sent: 05 June 2006 10:56
> > To: XSI(at)Softimage.COM
> > Subject: Re: help with motionblur optimizations - alternatives?
> >
> > Hi Adrian,
> >
> > >render bigger/wider then crop down after motion blur processing?
> >
> > I think I remember from reading in either the release notes or the docs
> > that XSI now has controls to help do that, keep the aspectratio and
> > camerasettings as is (no shifts in POV) but allow to render additional
> > sourounding pixels, like taking out the cache and rendering "open gate"
> > in real world.
> >
> > You know where that setting is?
> >
> > Or how would you reset the camera to keep the framing but get extra
> > pixels usually?
> >
> > Cheers
> >
> > tim
> >
> > P.S: I´ve just installed the demo, even the rsmb standard looks
> > great...
> > (exept for the  red cross and imprint but that´s o.k. for testing
> > it...)
> >
> >
> > ----- Original Message -----
> > From: "adrian" <adrian.wyer(at)fluid-pictures.com>
> > To: <XSI(at)Softimage.COM>
> > Sent: Monday, June 05, 2006 11:37 AM
> > Subject: Re: help with motionblur optimizations - alternatives?
> >
> >
> > render bigger/wider then crop down after motion blur processing?
> >
> > a
> >   ----- Original Message -----
> >   From: Lee_Carus(at)scee.net
> >   To: XSI(at)Softimage.COM
> >   Cc: owner-xsi(at)Softimage.COM ; XSI(at)Softimage.COM
> >   Sent: Monday, June 05, 2006 10:27 AM
> >   Subject: Re: help with motionblur optimizations - alternatives?
> >
> >
> >
> >   >Can you give examples where reelsmartmotionblur didn´t work?
> >
> >   The biggest one for me is when lots of objects are whizzing past the
> > camera at high
> > speed - it has trouble dealing with objects that have just gone (or are
> > going) out of
> > shot. Then again if the pixels simply aren't there to process whatchya
> > gonna do? :)
> >
> >
> >
> >         "Tim Leydecker" <BauerOink(at)gmx.de>
> >         Sent by: owner-xsi(at)Softimage.COM
> >         05/06/2006 10:18
> >               Please respond to
> >               XSI(at)Softimage.COM
> >
> >
> >        To <XSI(at)Softimage.COM>
> >               cc
> >               Subject Re: help with motionblur optimizations -
> > alternatives?
> >
> >
> >
> >
> >
> >
> >
> >   Hi Lee,
> >
> >   thanks for the link to revisionFX, I had thought ReelSmart MotionBlur
> >   to be a lot pricier. Admittedly, I don´t even have the $150 for the
> >   pro version (personally would go for the AE version) currently but
> >   that´s a matter of time...am about to upgrade to the Adobe Production
> >   suite and will probably just add the plug-in to that shellout then
> > soon.
> >
> >   Can you give examples where reelsmartmotionblur didn´t work?
> >
> >   Pierre Jasmin of revisionFX is an active member of the highend3D maya
> >   listserver, usually really responsive and open to looking at anything
> > that
> >   may break or stress "his baby". I´d forward it, as I´ll try to buddy
> > him for
> >   a student acount anyway - he´s probably nothing to do with sales,
> > thought.
> >   (May as well result in my email being put in his spamfilter. lol.)
> >
> >   Cheers
> >
> >   tim
> >
> >
> >   ----- Original Message -----
> >   From: <Lee_Carus(at)scee.net>
> >   To: <XSI(at)Softimage.COM>
> >   Cc: <owner-xsi(at)Softimage.COM>; <XSI(at)Softimage.COM>
> >   Sent: Monday, June 05, 2006 10:39 AM
> >   Subject: Re: help with motionblur optimizations - alternatives?
> >
> >
> >   I've found for most jobs ReelSmart Motion blur does a pretty good job
> > -
> >   Also afford you the luxury of being able to tweak the blur amount in
> > post.
> >   It's all done via the FXtree which is nice.
> >
> >   http://www.revisionfx.com/mblur.htm
> >
> >
> >
> >
> >   "Tim Leydecker" <BauerOink(at)gmx.de>
> >   Sent by: owner-xsi(at)Softimage.COM
> >   05/06/2006 08:59
> >
> >   Please respond to
> >   XSI(at)Softimage.COM
> >
> >
> >   To
> >   <XSI(at)Softimage.COM>
> >   cc
> >
> >   Subject
> >   help with motionblur optimizations - alternatives?
> >
> >
> >
> >
> >
> >
> >   ---I´m sorry if you get this twice, I had used a wrong
> >   email adress to submit, got a bounce reply, not sure it
> >   showed up anyway ----------------------------------
> >
> >   Hi guys,
> >
> >   I´m running into problems in tuning the speed of
> >   motionblur calculations. I suspect I do something wrong.
> >
> >   I have a scene, 650 000 tris, xsi_ambientocclusion
> >   piped into the ambient slot plus one pretty large and
> >   highly sampled arealight. Renders at roughly 1min10
> >   with reasonable AA (Box -1/2, 0,075 threshhold).
> >   (768x432px)
> >
> >   If I activate motionblur, shutter close at 0,5 and set
> >   Evaluate SRT for entire frame, Deformationblur to on,
> >   treshhold to 0,1 and keep the steps at 1, I get a rough
> >   12min per frame. Quality is decent, no problems with that.
> >
> >   Unfortunately, I won´t be able to use 3D motionblur with
> >   such a speedpenalty, because I can´t throw more machines
> >   at it to speed up turnaround but would have to bring pass
> >   time down to max. 3min/frame or 10min for all (~5) passes.
> >   I simply don´t have the time+budget to up any of that.
> >
> >   So, I´m desperately looking for alternatives, any tips
> >   you´d bewilling to share? Stuff I could read up on?
> >
> >   Cheers
> >
> >   tim
> >
> >
> >   ---
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