Re: Vertex Weights/Colouring
It sounds like they are using the vertex weight for other, per vertex, attribute values - rather than real vertex weights (which are normally used in animation)?
I believe the IPACS guys use their own custom AC3D plugin. I've not seen it but I'd recommend storing extra attributes in the data string (or the URL string) for each object. This is how X-Plane stores the object info in AC3D.
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