Depends on the definition of "character creation". If you want to invent entirely new shapes and turn them into characters, then you'll need a separate modeling app. But if you mean something a bit less severe, then Poser will do the job. A huge number of basic figures and props are available, and Poser gives you several ways to reshape those items. Note that I said "several", not "many". Most Poser users, sooner or later, bump into the edge of its native reshaping abilities.

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