I never upgraded to Carrara because the interface changed too drastically  from Ray Dream.  If the Bryce interface changes too much I will not upgrade either, and might as well learn something else, like XSI.  Like I said once before, Bryce may not be 'professional' and in the same league as hi-end programs, but in some ways, such as ease of use and productivity, nothing else comes even close at any price.  Bryce needs to be updated, not changed.

"An Example is worth Ten Thousand Words"