[Sidefx-houdini-list] random fur scale

Andy Nicholas andy at andynicholas.com
Mon Feb 11 18:08:45 EST 2008


Hi guys,

Sorry to hijack. Could someone just quickly explain what a CVEX shader is?
Not heard of this before. I take it it's different from a VEX shader? Is
is a compiled version? What situations would you use it for?

Thanks

Andy




> Hi,
>
> If you use the fur SOP for rendering you can simply use a Point SOP (or a
> VOP SOP) after it to deform your geometry.
>
> As the Fur SOP remove the Origin attribute you can use the Attribute
> transfert SOP to get it after the fur SOP.
>
> Here is an example using a Point SOP :
> Create a "scale" parameter and replace $TY by ch("scale")* rand($PR) *
> ($TY
> - $ORIGINY). It is similar to the random scale formula from the CVEX
> shader.
>
> But if you use the Procedural Fur shader for rendering you should use the
> CVEX shader in order to randomly scale each strands. CVEX is not
> difficulte
> and it is easy to load the random scale one from the help :-).
>
> Cheers
>
> Guillaume Laforge | La Maison
>
>
>
> On Feb 11, 2008 7:31 PM, Phil Spicer <PSpicer at bournemouth.ac.uk> wrote:
>
>> Hi,
>>
>> Is there a simpler way to get random fur scale with the fur SOP?
>> Recreating the cvex shader is er... not very intuitive.
>>
>> Kind regards,
>>
>> Phil.
>>
>>
>>
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>
>
>
> --
> Guillaume Laforge
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