G3DRenderer - Object

How well can Objects be leveraged to provide performance improvements? 
For example, can a group in the scene graph be designed to 
automatically create an Object the first time the group is instanced 
(say, with an array of children)? Would this be an application-specific 
optimization? Then the object could be drawn instead of traversing the 
group's children.

Can RenderMan geometric Objects be stored easily in a separate file? In 
a RIB file? This would be useful (to me). You could then use different 
Objects for different applications, but never have to re-build the 
scene graph. I cannot see any indication that archiving Objects 
separately is part of RI, but I also cannot see anything that would 
restrict this.

Brent Gulanowski
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