That's cool, you pay some money to support it

In fact , there are no better visual engine than other today :
All use the same shaders and graphic cards !
Well for 400 $ you could buy the new Torque game engine ?
It have complete lightening/shadows build in support.

Well shadows , don't do all a game, specially casual game.
You can make a platform game with simple blob shadows, or a space shooter without.

Even more on some games like Follout 3 , what is impressive is the amount of polygons , and the great quality of textures/models of the scene : During combat or play , you'll even forget shadows !

Well , let's perhaps one day we'll find a real complete demo to download ?