Cool idea. Dark is challenging. I will add it to SR. It's surely the track where we would need headlights in vehicles. If that was possible. I won't try this in Ogre 1.9, but it will be easy in Ogre 2.3 someday, hopefully.
Okay it's in repo. I named it NightJungle. Only changed description and view place. Not sure if I'll modify, I don't get that strange top pipe hit when driving.
Great that it has been added. Yes can always be done better as well. Just added it bcs it was out there, it evolved from blackmist experiment on an existing track.