We worked with an in-house team to migrate their on-demand user video rendering system from video capture hardware attached to PCs to an EC2 based solution. This involved using EC2 GPU capabilities, migrating the video renderer from Flash to C++/OpenGL, developing a high performance video encode/decode path, and parsing their complex internal format. We also contributed to their next generation scene architecture and provide ongoing support and improvements. The system renders many thousands of videos per month in production.