I found some interesting software: Chisel, a VRML optimizer.
It's free (PD) and written in Java. One could run any files through 
it to have them reduced. Of course, if Jmol can do it straight away, 
it's better.
Description of the optimization methods matches what we have been 
discussing about DEF / USE.
I've collated links and brief info into the Jmol Wiki > File formats 
> 3D Objects > VRML

This has also brougth another idea: to gzip the vrml file. Some 
viewers do not recognize the recommended extension, .vrz, but do read 
the file if it is gzipped but has wrl extension. Embedding wrz files 
into web pages seems to work fine.
So, Bob, maybe the export dialog could offer a double option?
 .wrl (plain VRML v2) or .wrz (gzipped VRML v2)

I am guessing that Jmol has the gzip algorithm embedded already, does 
it not?

And I think we should change the current default extension of vrml to 
be wrl which seems to be more widely supported.



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