A Bryce "Object" is usally the term used for a mesh that has been saved in Bryce's Object library, which result in an .obp format. For that you would obviously need the Bryce program. ;o)

And, yup like Cyba_Storm stated, Bryce 6.0 can convert a group of Bryce primitves into an exportable mesh that can be used in other programs. 

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