You might have come across the Irrlicht Engine user named 'sio2' already, he is known for example for his
cool looking Irrlicht Engine demos. One of the latest things he is doing is to use
irrEdit, the Irrlicht Editor: Because it is completely extensible, he wrote some plugins for it and this is how it looks like on his System:
The shot is showing his own custom scenenodes for terrain, vehicles and ocean, here
are some more. He also created a tree scene node plugin. Very nice.