Created almost 28 Tree Textures used Blender 2.72b, 3000x1000 - Image, Alpha Map, Normal Map included in this file. Material is set, ready to use for cycle render.
Vol I - http://www.blendswap.com/blends/view/81298
Vol III - http://www.blendswap.com/blends/view/81478
Good Work
Thanks For the Files