 | | | AA and motion blurring a depth pass or not (was RE: DOF and Depth Pass probl | AA and motion blurring a depth pass or not (was RE: DOF and Depth Pass probl 2005-03-22 - By Stuart Hall
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Thank you for all the replies.
In my own experience I've always used an anti-aliased and motion-blurred
depth pass. I know it is not a perfect, but then nothing ever is.
I'm sure if I stepped through my renders frame by frame I might see some
oddities, but I would bet I would see things on live action that I
wouldn't expect too. Reality is never as perfect as a CG simulation.
When things start moving it all happens so fast that I'm not sure any
oddity would be noticeable.
For still work I would be more careful. And I do already spilt up the
layers separately for extremely out of focus layers which is probably
why I haven't noticed any really weird artifacts.
Thanks again for all the input. I'll certainly be paying more attention
to my DOF in future.
Cheers
Stu
-- --Original Message-- --
From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On Behalf
Of Morten Bartholdy
Sent: 22 March 2005 14:53
To: XSI@(protected)
Subject: Re: AA and motion blurring a depth pass or not (was RE: DOF and
Depth Pass problem)
True Raffaele - and for transparent obejcts this is true also. Still
with FG
and BG split into separate passes there seems to be no cheap solution to
adding DOF to motionblurred material that I've heard of, except for
those
situations where depth in a given pass can be ignored and a fixed out of
focus filter can be applied to the separate passes. Any suggestions?
--
Morten Bartholdy | morten@(protected)
Denmark
-- -- Original Message -- --
From: "Raffaele "ThE_JacO" Fragapane" <jaco@(protected)>
To: <XSI@(protected)>
Sent: Tuesday, March 22, 2005 2:23 PM
Subject: RE: AA and motion blurring a depth pass or not (was RE: DOF and
Depth Pass problem)
> The one thing I think is missing is the context.
>
> when would you have a situation where you need a unified depth pass
for a
> quickly moving motion blurred foreground AND a moving motion blurred
> background?
>
> In those cases you usually isolate the depth passes for the foreground
and
> background elements to have more range and control on individual
items,
and
> in that case the artifacts of BG VS FG will not matter since what you
are
> doing happens in the object/bundle of objects in the respective
layers.
>
> There sure are situations where these issues may arise, but they seem
to
be
> mostly exceptions since most times you have a hero in foreground on a
shot
> plate and only additional props or photogrammetry on the back place.
>
> If we consider a single beauty for all the elements, or fully CGmovies
> rendered in one huge go, I'll agree; but how common a situation is
that?
> Passes should be sensibly used to split FG and BG layers as well, and
in
> that case you want individual depth passes.
>
> ~Raffaele Fragapane
> ~Lead "I'm sure we can make it work"
> ~Peerless Camera Company
>
>
> -- --Original Message-- --
> From: owner-xsi@(protected) [mailto:owner-xsi@(protected)] On
Behalf
Of
> Morten Bartholdy
> Sent: Tuesday, March 22, 2005 2:21 PM
> To: XSI@(protected)
> Subject: Re: AA and motion blurring a depth pass or not (was RE: DOF
and
> Depth Pass problem)
>
> Given that AA should be avoided as it introduces depth errors the same
goes
> for any other edgeblurring proces - mb included.
>
> I suppose the only solution to having motion blur AND DOF is the
expensive
> way. I'd like to be proven wrong though...
>
> --
>
> Morten Bartholdy | morten@(protected)
> Denmark
>
>
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