Attached Link: http://hinchu.com/tuts/hidden/

Also the Easter egg can be found here at the link, along with a ton of other undocumented features in Bryce5 (maybe not 5.5, I still refuse to buy that). Can't remember if I got this through Renderosity or Brycetech, could be either one I suppose (I think it was Brycetech). Still a useful site.