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p.s., Re: Offscreen Rendering

I said:

> Sorry, but sharing a DisplayRenderer between two DisplayImpls
> has no relation to sharing scene graphs between two DisplayImpls.

Actually, since DisplayRendererJ3D declares various top-level
noces in the scene graph, it is a logical place to look for
sharing a scene graph between two DisplayImpls. But there will
be very complex issues. For offscreen, you'd need to also look
in the 'if (api == OFFSCREEN)' section of DisplayImplJ3D.initialize(),
and study what the Java3D documentation has to say about
sharing scene graphs between multiple Canvas3Ds. Much easier to
first explore alternate approaches.


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