This tools allow you to exporting lightmapped scene from 3DMAX directly into Irrlicht.
Read more about this tool in this thread
http://irrlicht.sourceforge.net/phpBB2/viewtopic.php?t=3198&postdays=0&postorder=asc&start=150
New features in My3D v.3:
- lightmaps integration in my3d file - very, very easy to use exporter
(now you don't need to converting images into 'jpg' format and to copy them into 'Lightmaps' directory);
- two methods of compression of the embedded lightmap data
(simple compression and RLE compression);
- 16 bit and 24 bit format of the embedded lightmap data;
(for 16bit more effective to use simple compression, for 24and - RLE compression);
- lightmaps as standalone image files also possible
(but i don't use it any more in my project);
- GUI interface for the exporter;
- transparent materials support.
The My3D tools:
1) My3D Plugin (source and binary included);
http://zdimitor.nm.ru/MY3DPlugin.zip
1) My3D Example (loader for the Irrlicht and test scene included).
http://zdimitor.nm.ru/MY3DExample.zip
Usage:
1) Create lightmapped scene in 3DSMAX;
2) Use My3D plugin to export it into *.my3d file;
3) Load scene into Irrlicht with this class
(CMy3DMeshLoader included in My3D Example);
4) Enjoy!
SceenShoot (My3D Example with Irrlicht 0.7.1):

P.S.:
I test it only with 3DSMAX5, if you want to use it with MAX6, you must recompe my3d plugin with maxsdk6.