I've never dealt with importing an fbx item, so take this with a grain of salt.

You can add a primitive like a box to your scene. Go into the setup room and add a bone, any bone. When you go back to the pose room, that box is now a figure. Make it transparent. Then parent your fbx props to the transparent box figure. That way, you can add the transparent box figure to your character library as a cr2.

I have no idea what gets saved rigging-wise, so, like I said, take this with a grain of salt, but this would save the parts in a cr2. I don't know how usable it would be. Versum knows better.

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Old lady hobbyist. All visual art or fiction is "playing with dolls."

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