While wandering through the internet I've found an interesting 3D engine called Aurora which is apparently used in professional flight simulators. What strikes me the most is the amazing quality and the rendering which is well above most 3D engines we know. It clearly uses state of the art techniques such as physically based rendering, cloud light scattering, atmosphere light scattering, water rendering, etc that we usually only see in very technically advanced games.
If you're curious about what I'm talking about then check the following video (I fast forwarded to the best part):
This engine clearly took some serious development time and skills to make. And although I know the aviation industry (particularly the military one) involves a lot of money, I still think it's curious how they were able to find the people with the skills to do it.
I'd like to hear your opinions about this engine. If anyone knows where this engine came from, what techniques it uses, etc then please let me know.
There are also other videos apparently from previous versions of the engine. The rendering quality is inferior but still very decent: