Generic Tree V3 is perfect for visualization projects and nature scenes. Included are material for both Corona 1.5 and Vray 3.4. The included Max File is set up for Corona render. To convert to Vray, open the file, merge the file Vray.max, and apply the material of the imported object to the tree. My apologies for this extra step, but it saves space in the archive and makes for a quicker download!