Credits: Framestore London
Use: Sully's Arrival (opening sequence of Avatar)

"The human base was surrounded by an immense forest. Here, Houdini and Xfrog were utilized to prototype layouts for the forest. To easily test many layouts, many points were scattered where they desired trees and were used as instance points. With this they were able to vary the sizes and species of trees, make fine-tuned adjustments and then quickly render with Mantra. Once a layout was approved it would be sent to the lighters for final rendering."