Irrlicht Engine

Hi guys! New to Irrlicht here, but I must say that after going through it all, it really is one of the best engines out there. For the past 9 months I have been playing around with TV3D and that engine (even though its commercial) doesnt come even close to irrlicht. Development, Support, and functio...

Guys Im wondering, with the octree and frustrum culling present in Irrlicht, it is possible to make one large city model and import it and not have it lag?