Ok, then the x-ray engine (powering Stalker) provides better lighting, full lights and shadows applied to every mesh, like you can see here:
![](http://www.thez0ne.com/b/wp-content/uploads/2008/08/stalker_clear_sky_5.jpg)
![](http://www.winboard.org/forum/attachments/game-news/19628d1186028450-stalker-clear-sky-videobotschaft-aus-limansk-800x600_ea8e24c79c521a18055e2018fb58c2ce.jpg)
![](http://www.pcgameshardware.de/screenshots/original/2008/03/Stalker_Clear_Sky_2007.JPG)
What a huge difference this makes. But maybe the conversion from the console version of Fallout to PC is the reason for this.
A projection shadow shader would do the job for all the geometry, no matter how many polygons. It is calculated per pixel and needs a depth map for the right projection. There is no pc from the year 2012 needed for that.