As someone who works with autonomy for UAVs, previous simulation tools such as gazebo etc. are great for developing and testing control and path planning algos. However, developing, testing and tuning perception techniques such as visual inertial odometry, vision based slam remains and challenge since it typically requires getting your hands on real world data. Photorealistic rendering envs should make it a lot easier for developing good perception algorithms faster. The tools looks very promising, thanks for sharing it and keep up the good work.