But why have another node that is similar to the Separator, but 
slightly different?  Seems a waste of parsing effort to me, and just 
makes things more complex.
I think there are two issues
1) annotation - this is text (maybe should be generalized into any 
geometry) which always follows the viewpoint, and has some scaling 
and hidden surface rules - you can get around the z-buffer problems 
by drawing any annotation objects last (and switching the z-buffer 
off).  Annotation is a special effect required in some applications 
where some description, normally textual, is required
2) auto-facing objects - these just follow the user.  They are 
treated like all other object in the rendering pass - they are 
z-buffered etc. and drawn to a fixed scale.
I get the feeling the issue here is that Inventor doesn't support 
this - is this the case?
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Steve Ghee ( [email protected] )
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