Bugzilla Bug 35652

from their homepage:
---[quote start]---
The Irrlicht Engine is an open source high performance realtime 3D engine written 
in C++. It is completely cross-platform, using D3D, OpenGL and its own software 
renderer, and has all of the state-of-the-art features which can be found in 
commercial 3d engines.

We've got a huge active community, and there are lots of games in development that 
use the engine. You can find enhancements for Irrlicht all over the web, like 
alternative terrain renderers, portal renderers, world layers, tutorials, bindings 
for perl, ruby, python, and so on. And best of all: It's completely free.
---[quote end]---

seriously, it seems like a very developer-friendy ;) and powerfull cross-platform engine.
IMHO probably not as powerfull as CrystalSpace, but a hell lot easier to learn and use. ...great tutorials and howto's, btw

not exactly sure what you were looking for, but heres what ya got:
dev-games/irrlicht:
/usr/lib/libIrrlicht.a
/usr/include/irrlicht/<all the header files needed to use that lib>
bunch of sdk samples in /usr/share/doc/${PF}/examples when you compile with 'doc' in use USE