It doesnt. You need a third-party software if youre on a PC. If youre Mac, youre more or less SOL. About the only thing you can do there is create whatever camera moves you plan on using in Bryce, create the animation there as a QuickTime, and then import that into Poser where it will function as a background piece. You then build your Poser animation to reflect that. The only problem there is that you wont have any shadows cast by the figures on the ground, because with a background animation, its difficult to position a ground without screwing up the animation.