Its impossible, that you make an engine like the of CS2D, utter crap, omg. The maps looks only good because the Sprites have Shadows, but no Physical Shadows, the Shadows are in the PNG Sprite

oh. ok.
I didnt want to talk wuth you abuot that

EDIT:
If someone is interested with Sourcelike engine.
You can whatch.
It will be released atleast in 5th versio.
Becouse its buggy.
http://www.fpsbanana.com/wips/screens/28874?img=http://image.hazardstrip.com/ss/wips/64968.jpg