[Sidefx-houdini-list] dPds, dPdt troubleshooting...

Simon Barrick simon at primalpictures.com
Thu Aug 31 05:53:56 EDT 2006


If you are using Polys forget it, you have to hack it. If it's a
parametric surface you should be ok.


-----Original Message-----
From: sidefx-houdini-list-bounces at sidefx.com
[mailto:sidefx-houdini-list-bounces at sidefx.com] On Behalf Of
hoknamahn at cgtalk.ru
Sent: 31 August 2006 10:54
To: sidefx-houdini-list at sidefx.com
Subject: [Sidefx-houdini-list] dPds, dPdt troubleshooting...


Hey guys!
Can you explain me how mantra calculates derivatives? I know they depend

on topology of geometry. Does they depend on vertex order? I'm playing 
with anisotropic shader based on dPds, dPdt and do some test. Each test 
gives me an unpredictable result.
Don't let me die from this headache, please!
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