"Why would you want to render in Ver. 5.x when you have Ver. 6.x ?.. ..."   I render animations occasionally in Bryce5 because that version will still allow you to animate materials and terrains/lattices which I can use either in Bryce or in other apps. As far as I know this feature is still "broken" in Bryce6. I'm sure ver.6 with its HDRIs and image-based lighting can still give you a superior render for still images.