I just purchased my copy of the global ilumination software called Gile[s] and I must say it's the best 50 bucks I've spent lately!
It's capabilities surpass anything I had seen in a lughtmapping software; it imports all major 3d formats seamlessly and works quite fast; and using Zdimitor's "my3d" format exporter you can get your level into the Irrlicht engine in no time!
a must for any 3d enthusiast or game developer!
for more info on Gile[s] visit their site:
for info on Zdimitor's My3d format:
check the project in the Irrlicht forums: