Check your Projection Cage and padding. You also might want to have a look at this http://wiki.polycount.com/NormalMap?highlight=%28%5CbCategoryTexturing%5Cb%29#Sloped_Extrusions
new update. http://www.digitalfossils.com/Download/VoidWorld-Dec-28-12.rar Summary of changes: * Some bugs in 'Take Snapt Shot' operation are fixed. Thanks!
Your tree would benefit greatly from Vertex Normal. Check out this wiki page http://oldwiki.polycount.com/VertexNormal?highlight=%28\bCategoryEnvironmentFoliage\b%29
http://wiki.polycount.com/CategoryEnvironmentFoliage?highlight=%28%5CbCategoryEnvironment%5Cb%29#Foliage_Tutorials You can find very useful infos/tuts about everything on the Polycount Wiki .
If it was that easy everyone would do it... but seriously - the polycount wiki is pretty good for all aspects of 3D http://wiki.polycount.com/CategoryCharacterTexturing?highlight=%28%5CbCategoryCharacter%5Cb%29