Just wondering something here, maybe it's a "dumb" question - but here it goes anyways...

Is there any difference between making an otherwise empty .car file with an object in it and those various items found in objects tab of Carrara's browser?

If it's the same, are there any recommended settings for saving the .car file?

Why do I ask?  I'm thinking about making a Carrara version of some models in addition to a plain .obj file. The difference is that the Carrara one would have shaders applied, and maybe some rudimentary setup things done to it like having parts heirarchy properly laid out and adding movement constraints to some parts. I might even consider throwing on some other things, but those may require plugins such as Sparrowhawke3D's Wheels Behavior modifier.

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Barbequed Pixels?

Your friendly neighborhood Wings3D nut.
Also feel free to browse my freebies at ShareCG.
There might be something worth downloading.