Well when it comes to render speeds, please note my tutorial on render settings! :)
http://www.silverblades-suitcase.com/tutorials/htm/48.html

"I'd rather be a Fool who believes in Dragons, Than a King who believes in Nothing!" www.silverblades-suitcase.com
Free tutorials, Vue & Bryce materials, Bryce Skies, models, D&D items, stories.
Tutorials on Poser imports to Vue/Bryce, Postwork, Vue rendering/lighting, etc etc!