Re: help with motionblur optimizations - alternatives?

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

Oh,

thanks alot Kim. Took me a couple of minutes to test it out.
I´m still fiddling with the values for resizing, hoping to avoid
rounding errors in outputsize and FOV value that´d result
in a one pixel wide halo (e.g. if you´d use difference mode
to check the unresized layer over the resized one).

Basic math should provide the proper value for that, e.g.
calculating the smallest common value but I´m doing it
brute force by trial&error since my brain is aching allready.

Whatever, the above would only be neccessary for comps
that have allready been rendered or need to match other plates
but - fortunately - I`m not that far down the road. (I should be...).

Thanks again for providing your great script.

Cheers

tim


----- Original Message ----- 
From: "kim aldis" <kim(at)aldis.org.uk>
To: <XSI(at)Softimage.COM>
Sent: Monday, June 05, 2006 12:39 PM
Subject: RE: help with motionblur optimizations - alternatives?


Works on the camera in the current pass. Just run it, give it the pixel
increase and away it goes.

Yes, the stuff in the docs will get you where you want, it's a little bit of
basic trig, used to work out how much fov for how much pic increase.

> -----Original Message-----
> From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> Behalf Of Tim Leydecker
> Sent: 05 June 2006 11:24
> To: XSI(at)Softimage.COM
> Subject: Re: help with motionblur optimizations - alternatives?
>
> 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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> >>
> >>
> >>
> >>
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