bad motion blur 2004-02-11 - By kim aldis
Back
If you turn off caching you'll not be able to repeat the particle sequence,
it'll just carry on from where it left off last time. The reason the blur's
not working is probably because mental ray isn't able to correctly get prior
or next frames. Pre-build the cache files by playing back a wireframe then
write protect the cache files before rendering.
> -- --Original Message-- --
> From: owner-xsi@(protected)
> [mailto:owner-xsi@(protected)] On Behalf Of lucas
> Sent: 11 February 2004 14:45
> To: XSI@(protected)
> Subject: AW: bad motion blur
>
>
>
> Hi there,
>
> I had the same problem and it seems that if you change the
> simulation from "Standard Caching" to "Standard No Caching",
> the Motion Blur works ... strange... well at least it worked
> for my scene.
>
> Hope it works !
>
> Lucas
>
> -- --Urspr�ngliche Nachricht-- --
> Von: owner-xsi@(protected) [mailto:owner-xsi@(protected)]
> Im Auftrag von Morten Bartholdy
> Gesendet: Wednesday, February 11, 2004 9:56 AM
> An: XSI@(protected)
> Betreff: Re: bad motion blur
>
> Since the problem exists only at specific angles, if you need
> higher shutter close than that, you could simply key a
> slightly different angle on the offending frames. I had the
> same, and it seems the shutter close "safe"
> threshold varies, dependant on scenario.
>
> MB
>
>
>
> -- -- Original Message -- --
> From: "Dan Yargici" <dan@(protected)>
> To: <XSI@(protected)>
> Sent: Wednesday, February 11, 2004 9:09 AM
> Subject: Re: bad motion blur
>
>
> > > I have a ball translating and rotating...very simple. I
> have one or
> two
> > > bad frames showing some strange artifacts due to motion blur.
> >
> > I had this also, see the pasted thread below:
> >
> >
> -- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
> -- ---- --
> --
> -- ------
> >
> > 0.666 - Oooooh scary........ ;)
> >
> > Cheers Robert.
> >
> > DAN
> >
> > -- -- Original Message -- --
> > From: "Robert Martinu" <antediluvian@(protected)>
> > To: <XSI@(protected)>
> > Sent: Wednesday, December 31, 2003 12:20 PM
> > Subject: Re: Motion blur bug in 3.5.1.1?
> >
> >
> > > With your code snippet set to "at shutter speed":
> > > set "shutter close" to less then 2/3 and you'll get
> correct results.
> > > (0.666 works, 0.667 doesn't)
> > >
> > > Robert
> > >
> > > -- -- Original Message -- --
> > > From: "Dan Yargici" <dan@(protected)>
> > > To: <XSI@(protected)>
> > > Sent: Wednesday, December 31, 2003 11:01 AM
> > > Subject: Re: Motion blur bug in 3.5.1.1?
> > >
> > >
> > > > I tried that also and it didn't work for me....
> > > >
> > > > If you have 2 minutes can you try it with the script snippet I
> sent.
> Just
> > > for curiousity's sake.
> > > >
> > > > Cheers,
> > > >
> > > > DAN
> > > >
> > > >
> > > > -- -- Original Message -- --
> > > > From: "Adam Sale" <adamsale@(protected)>
> > > > To: <XSI@(protected)>
> > > > Sent: Tuesday, December 30, 2003 8:43 PM
> > > > Subject: Re: Motion blur bug in 3.5.1.1?
> > > >
> > > >
> > > > > I had the same problem.. The solution is to activate the
> "Evaluate
> > > Motion
> > > > > SRT at shutter speed" in the motion blur controls pulldown of
> the
> > > render
> > > > > options ppg. This is instead of using Evaluate Motion SRT for
> the
> entire
> > > > > frame
> > > > >
> > > > > Adam
> > > > > -- -- Original Message -- --
> > > > > From: "Dan Yargici" <dan@(protected)>
> > > > > To: <XSI@(protected)>
> > > > > Sent: Tuesday, December 30, 2003 5:04 AM
> > > > > Subject: Re: Motion blur bug in 3.5.1.1?
> > > > >
> > > > >
> > > > > > Wow! a reply from support and a bug number before the mail
> even
> got to
> > > the
> > > > > list!
> > > > > >
> > > > > > 96270 XSI increasing Interpolation Steps causes render
> glitches
> when
> > > > > object at certain angles
> > > > > >
> > > > > > *That's* why softimage can claim the crown when it comes to
> > > support.....
> > > > > :)
> > > > > >
> > > > > > Great work support folks, bummer about the bug
> though........
> > > > > >
> > > > > > DAN
> > > > > >
> > > > > > -- -- Original Message -- --
> > > > > > From: "Dan Yargici" <dan@(protected)>
> > > > > > To: <XSI@(protected)>
> > > > > > Cc: <support@(protected)>
> > > > > > Sent: Tuesday, December 30, 2003 2:17 PM
> > > > > > Subject: Motion blur bug in 3.5.1.1?
> > > > > >
> > > > > >
> > > > > > > I just finished a job where I needed rotational
> motion blur
> and
> much
> > > to
> > > > > my joy Softimage had just
> > > > > > > released 3.5.1.1 - hurrah! However I found I was getting
> random
> > > > > glitches on certain frames... :(
> > > > > > > and now I'm through that nightmare I've managed
> to rustle up
> a
> > > simple
> > > > > setup to demonstrate:
> > > > > > >
> > > > > > > CreatePrim "Cube", "MeshSurface"
> > > > > > > Scale , 0.127906976744186, 1, 1, siRelative, siGlobal,
> siObj,
> siXYZ
> > > > > > > MoveCtr2Vertices "cube.pnt[2,3,6,LAST]", False
> > > > > > > Translate , 0, -4, 0, siRelative, siLocal, siObj, siXYZ
> > > > > > > SaveKey
> > > > >
> "cube.kine.local.rotx,cube.kine.local.roty,cube.kine.local.rotz", 0
> > > > > > > Rotate "cube", 0, 0, 2880, siAbsolute, siAdd, siObj, siZ
> > > > > > > SaveKey
> > > > >
> "cube.kine.local.rotx,cube.kine.local.roty,cube.kine.local.rotz",
> 100
> > > > > > > SetCurveType "cube.kine.local.rotz", 2
> > > > > > > SetValue "ViewRenderOptions.MotionBlur", True
> > > > > > > SetValue "ViewRenderOptions.MotionBlurRed", 0.05
> > > > > > > SetValue "ViewRenderOptions.MotionBlurGreen", 0.05
> > > > > > > SetValue "ViewRenderOptions.MotionBlurBlue", 0.05
> > > > > > > SetValue "ViewRenderOptions.MotionBlurAlpha", 0.05
> > > > > > > SetValue "ViewRenderOptions.ShutterClose", 1
> > > > > > > SetValue "ViewRenderOptions.MotionSteps", 5
> > > > > > >
> > > > > > > Look at frames 9,21,34,46,59,71,84 and 96 - basically any
> frames
> > > where
> > > > > the object is close to the
> > > > > > > same certain angle. It renders consistently when
> the steps
> are
> set
> > > back
> > > > > to 1....
> > > > > > >
> > > > > > > Most bizarre, I think you'll agree......
> > > > > > >
> > > > > > > DAN
> >
> > ---
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