The engine is now able to render cameras and panels into textures (without MSAA, which might be possible, but for now I decided to not implement it). This also allows for postprocessing.
So here is some bad red-cyan anaglyph:


Lite-C Tut. 1 Lite-C Tut. 2 Lite-C Tut. 3 (en)
Shader Tutorial (ger)

http://www.slindev.com