I wanted a fast and realistic rendering tree for my project. I made a tree which looks fairly real and renders comparatively fast. I found some really great looking trees out there but all had very big render times and huge size files.
I scratched my head thinking about how to make it more real.To bump the realistic part of the tree I have added 3 kind of leaves, as it is a growing object, It's obvous that some leave will be new and some old.
The tree has total 25000 particles or leave on it. I can render it in 1024x1024 resolution with 50 sample on gtx 570 in about 17 second.(Including displacement on tree bark).(In blender v. 2.68)
I hope you like the object and use it in your projects. Please leave a feedback about how you liked it or what project you used it in.
Also Check out the different image previews above in different world settings