Lyrra - I've got the best Bryce5 trees you'll ever see for sale here at Renderosity. Check out my store for the b5 treefarm, volumes I and II. The only restriction is you cannot resell the models or use them to sell your own tree images/libraries for resale - but they can totally be used in commercial work, pre-vis, and print jobs for clients. They have custom DTE textures that can be placed right next to the camera and hold tons of detail and realism. Currently there are 20 diverse trees in the collections. Check them out - I think they're what you're looking for. They're not free but you get what you pay for. The material collection alone is well worth it. There are sample images at my site: www.scotttucker3d.com - Scott