I read through this thread quite a few times and tried to code it but I still don’t understand how to use this octree… 
How to generate egg with octree? How to use it later? Could you be so kind as to modify the Roaming Ralph sample to use octree for collisions? This won’t take a lot of your time I am sure, and such tutorial will be very, very helpful for those who just start using Panda and Python, like me 