Well a poser-model rendered in Bryce is technical speaking still Bryce, afteral you used the render-engine (and for good reason). But since this is a model that you can't do within Bryce itself i have a hard time calling it a Bryce work. Just be fair about it.

Robert van der Veeke Basugasubasubasu Basugasubakuhaku Gasubakuhakuhaku!! "Better is the enemy of good enough." Dr. Mikoyan of the Mikoyan Gurevich Design Bureau.