[Sidefx-houdini-list] where are the default shadow shaders?

Robert Kelly isstuff at gmail.com
Tue Oct 27 18:38:02 EDT 2009


i was asked the other day is it possible to have a combination shadow shader
that reads a shadow map and retraces some objects, by making a shadow shader
that is a bit more complicated?


2009/10/27 Szymon Kapeniak <szymon.kapeniak at gmail.com>

> ups, I didn't understand you. If you add VEX Shadow shader in Shops, this
> is
> apparently the code used in default light. It's usually saved in
> OPLibShopVMantra.otl.
>
>
>
> 2009/10/27 Robert Kelly <isstuff at gmail.com>
>
> > yes i am doing that now i just want to know where the original shadow
> > shader
> > code are so i can add to them in staid of reinventing the wheel.
> >
> > 2009/10/27 Szymon Kapeniak <szymon.kapeniak at gmail.com>
> >
> > > The simple way is to add "shop_shadowpath" property to a light and
> apply
> > > own
> > > shader this way. Houdini assigns shader to default lights via light
> > > wranglers scripts (check soho folder in $HFS). Default light uses
> > > v_rayshadow shader I suppose.
> > >
> > > You could install modified version of that shader in a session,
> replacing
> > > default shader, but this way you won't have an access to custom
> > parameters
> > > on a shader (without modifying both light params and soho script or
> > > creating
> > > new light definition type) .
> > >
> > >
> > > hope this helps,
> > > skk.
> > >
> > > 2009/10/27 Robert Kelly <isstuff at gmail.com>:
> > > > Hi people.
> > > >
> > > > where are the default shadow shaders?
> > > >
> > > > if i want to tweak the ray trace shadow shader where can i find its
> VFL
> > > code
> > > > so i can change it?
> > > >
> > > > thanks
> > > >
> > > > Robert Kelly.
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