Re: motionblur...AGAIN

[Votch <megavotch(at)gmail.com>]

I've ran into the same problem with sampling and filtering. No matter what you try the re-projected output is softer. Even when doubling the resolution of the first pass will result in massive loss of detail in the MB pass. That combined with the inability to re-project correctly on displaced objects and the issue with self occlusions has ruled out the solution for fast moving character work.

However, on TheMist I was able to get reasonable rendertimes with true 3DMB. Average frame time was 13 min for creature shots with SSS, AO, and fully buffered passes. It's possible, but it's a TON work.

On Nov 6, 2007 6:33 AM, Tim Leydecker <BauerOink(at)gmx.de> wrote:

Can you guys recommend a setting for reprojection that
results in the least amount of blur for the projected images?

While camera mapping a sequence is quite easy, turning off
the filtering (resulting in a washy, blurred image) seems hard?

Last time I tried it (on a fast moving cell-phone spot), the
results where as if I had rendered to fields, thrown away
half of them, gaussian blurred by one pixel, then reprojected...

The only thing left to completely kill the workaround would
have been a mR [autocontrast/autolevels operation on source]
optimization impossible to turn off. Even without that, subjective
loss of sharpness due to sourceimage filtering seemed unacceptable.

Cheers

tim

----- Original Message -----
From: "Daniel Jahnel" <xsi-list(at)gmx.de>

To: <XSI(at)Softimage.COM>
Sent: Tuesday, November 06, 2007 3:21 PM
Subject: Re: motionblur...AGAIN


> everybody should be able to use it:-)
>
> no, didnt even bother to try out 6.02...
>
> Morten Bartholdy wrote:
>> If it was easy, everybody could do it ;)
>>
>> Did it work for you in 6.02? Reason I ask is I have put off installing
>> 6.5 here because I am in mid-production, and if MV are bust I certainly
>> won't go there anytime soon. Oh, and it works fine for me in 6.02.
>>
>>
>> Morten Bartholdy
>> 3D & VFX Artist
>>
>>
>>
>> ----- Original Message ----- From: "Daniel Jahnel" < xsi-list(at)gmx.de>
>> To: <xsi(at)Softimage.COM>
>> Sent: Tuesday, November 06, 2007 12:27 PM
>> Subject: motionblur...AGAIN
>>
>>
>>> hi everyone...
>>>
>>> [Rant_start]
>>> so we're giving 6.5 a chance here now...first thing i try is motionblur.
>>> motionvectors dont seem to work properly, i always get some offset in my
>>> motionvector pass in comparison to the beauty pass, even if i set
>>> shutter to "end on frame". if i set speed to 0 it works but i dont get
>>> any vectors...great. how am i supposed to use these settings?? its
>>> completely confusing that you have a shutter speed in the renderer and
>>> some dubios shutter-open-close parameters in the scene...why is
>>> motionblur always a pain in xsi?? for many versions its just constantly
>>> broken and unusable at times and one always has to fight it....dont
>>> people use motionblur?? back to reprojecting then...
>>> [Rant_end]
>>>
>>> Daniel
>>>
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