Re: Test...

["Daniel Rind" <daniel.rind(at)chello.at>]

Hm might be >_> I like testing stuff in the rendertree first - if I can get 
it to work there, I can get it to work as a compiled shader.

The thing is really limited, though - it only works because the world X/Y 
coordinates match the texture X/Y coordinates in the sample (that's why the 
grid is upright, and not lying in the XZ plane...).

Ciao, Daniel!

----- Original Message ----- 
From: "Kim Aldis" <XSI(at)kim-aldis.co.uk>
To: <XSI(at)Softimage.COM>
Sent: Friday, January 26, 2007 5:53 PM
Subject: RE: Test...


> Now you're just showing off.
>
> Wasn't it you that did AO for the first time in the RT Daniel?
>
> > -----Original Message-----
> > From: owner-xsi(at)Softimage.COM [mailto:owner-xsi(at)Softimage.COM] On
> > Behalf Of Daniel Rind
> > Sent: 26 January 2007 16:40
> > To: XSI(at)Softimage.COM
> > Subject: Re: Test...
> >
> > OK, there's something really weird going on here... I'm trying to send
> > as plain text now:
> >
> > > That only 8bit data thing for the tangents is odd, since they use
> > > float arrays...
> > > on the other hand, that whole normal mapping technique is unprecise
> > as
> > > hell anyways, so I guess nobody will ever notice... ;)
> >
> > From taking a look at the SDK docu, it seems that Vertex Color
> > properties (like the tangent op generates) are stored as short int
> > internally. Still, that should give 65k colors per channel, not 256...
> >
> > > How about parallax mapping, can you shed some light on that
> > technique?
> >
> > André already explained it nicely.
> >
> > I wanted to see if I could quickly mop up a rendertree that does
> > parallax mapping, and it worked :) Looks quite nice, even.
> >
> > Here's a quick render:
> >
> > http://animus.brinkster.net/temp/Parallax.mov
> >
> > I also put the scene up:
> >
> > http://animus.brinkster.net/temp/Parallax.zip
> >
> > You can play with the PARALLAX_SCALE and PARALLAX_OFFSET nodes to
> > influence the strength of the effect.
> >
> > Ciao, Daniel!
> >
> > PS: Looking at the render tree can also cause nausea, headaches and/or
> > breathing difficulties :P
> >
> >
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>
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