Things in B6 that are not in B5.5:

1. Boolean modeling that can then be exported
2. IBL lighting system
3. Transport a whole animated sequence from DazStudio into Bryce.

Er... can't remember if there's anything else.
disadvantages: imported objects are black - totally black.

However, you can have B5.5 AND B6 available on the same PC and even open at the same time. And if you import an object into B5.5 - save it to a preset folder, then copy the folder to the B6 presets and open it in B6 then the colours are there - but as I import stuff to Bryce in order to immediately change the materials I don't have the time to faff about with that.

Easier to select entire object, and slap grey onto it...

Measure your mind's height
by the shade it casts.
Robert Browning (Paracelsus)

Fran's Freestuff

http://franontheedge.blogspot.com/

http://www.FranOnTheEdge.com