While not optimized for real-time game engines out-of-the-box (due to high poly count), Vol 5 is excellent for pre-rendered cutscenes or game splash screens. You can bake the high-poly geometry into normal maps for lower-poly game assets.
: Chinese Bishopwood, Happy Tree Plant, and Hardy Rubber Tree. Poplars & Hackberries : Chinese Hackberry, Simon Poplar, and Downy Poplar. Technical Specifications Renderer Compatibility maxtree plant models vol 5
Original plugin files for 3ds Max, allowing users to modify plant shapes and growth Plant Models Vol 5 - Maxtree Happy Tree Plant