I don't pretend to be up there with the best, but I learned Bryce by messing about with it in my spare time. I'm not one for manuals or tutorials unless I'm totally stuck, 'cos it's only by experimenting that you'll learn and get your own style. Bryce is a great program. I've been using it about 9 months now and there're still things I'm finding out. The one thing I find invaluable in Bryce is the spot render function using the airbrush. I use it literally thousands of time on every pic, and it's prefect for quick checks of textures, positions, colours, shadows, etc. I can't imagine working without it.