 | | | Camera projections & elliptical filtering | Camera projections & elliptical filtering 2004-03-08 - By David Saber
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-- -- Original Message -- --
From: "Harry Bardak" <Harry@(protected)>
To: <XSI@(protected)>
Sent: Monday, March 08, 2004 8:47 PM
Subject: Re: Camera projections & elliptical filtering
> hi bernard
>
> Can you describe how you did your camera mapping ? Can help to solve your
> problem.
> There are some tricks to deal with cam proj..... so...
>
> A bientot.
>
> -- -- Original Message -- --
> From: "kim aldis" <kim@(protected)>
> To: <XSI@(protected)>
> Sent: Monday, March 08, 2004 7:19 PM
> Subject: RE: Camera projections & elliptical filtering
>
>
> > There can be a problem where camera projections don't map well to
polygons
> > that are skewed to the view from the camera. The effect is a sort of
> > triangulated breakup of the texture where no one triangle from a poly is
> > projected the same as any other. The only solution is to make polys
> smaller,
> > usually by upping the subdivision or increasing NURBS step sizes.
> >
> > The other thing you could find is a softening of the texturing. Enough
to
> > show a difference if you're using a camera projection matched against
liv
> e
> > action.
> >
> > > -- --Original Message-- --
> > > From: owner-xsi@(protected)
> > > [mailto:owner-xsi@(protected)] On Behalf Of Bernard Lebel
> > > Sent: 08 March 2004 17:32
> > > To: xsi@(protected)
> > > Subject: Camera projections & elliptical filtering
> > >
> > > Hello,
> > >
> > > Has anyone had any problem with camera projections and
> > > elliptical filtering?
> > >
> > > The texture folks here use camera projections most of the
> > > time, and thye convert to pyramidal filtered .map files.
> > > Now, since we have to use elliptical filtering to get good
> > > results with pyramidal files, we get prettyweird artefacts. I
> > > mean serious stuff, the kind that is not usable (the various
> > > resolution textures blend awefully together).
> > > Now after a reading of the mr docs, I begin to suspect that
> > > it is related to camera projections, even though they are
> > > generally frozen before rendering.
> > >
> > > Any help or pointer in the right direction would be quite wlecome.
> > >
> > >
> > > Thanks
> > > Bernard
> > >
> > >
> > >
> > > http://www.bernardlebel.com
> > > http://www.xsimontreal.com
> > > http://www.xsibase.com
> > >
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> >
> >
> >
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