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.