[Sidefx-houdini-list] New Lighting Tutorial at www.sidefx.com

Robert Magee rmagee at sidefx.com
Wed Jan 18 09:58:15 EST 2006

The artist, Lisa Kelly who worked on this project (and wrote the 
tutorial) built the models with a clear idea of how she was going to 
texture it. In her modeling network, she created groups of primitives 
that would get shaded together. Then she would export the model to a 
.bgeo file which would include group info. Once the model was imported 
into the layout scene she could then add a Shader SOP for each group she 
had created then set the "Group" parameter to the appropriate group name.

The advantage of this approach is that you don't need to break up a 
model to apply different shaders. Of course that is an option but it is 
not necessary. It is nice in Houdini that a single object can contain 
several merged pieces of geometry. It keeps the object level a little 
less cluttered. Generally I only break up a model when I need a separate 
piece to move on its own (lenses, knobs etc....) in case I want to 
animate it.


Jean-Claude Nouchy wrote:

> Hey Robert,
> just a guess.. why you applied many Shader SOPs instead of just one 
> with multiples numbers of surfaces? since i'm learning i'm curious if 
> there's any special reason or was just a "preferred way of working" 
> you might had. I'm talking about the geometries like lenses and so on 
> .. which have a File SOP and then many Shaders SOP one after each other.
> thanks
> cheers.

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