- Switch to cmake
 - Independent KFont library for font read/write
 - Screen space reflection (by Parsifal Wang)
 - FFT lens effects
 - Stereo rendering without performance penalty (by Rui Wang)
 - Faster GI (by Shunbin Chen)
 - Collision detection utilities (assisted by Xiaoyang Zhu)
 - Better OpenGLES compatibility
 - Add atmospheric scattering
 - Add SSGI
 - A JIT for effect system
 - Add new tools
 - Add tutorials
 - Enhanced 3DSMax exporter
 
You can download KlayGE 4.1 here.
KlayGE 4.1 is still using dual license: A open source license GPL and a proprietary one KlayGE Proprietary License (KPL). Details in Licensing.
