Ali213.net brought us some screenshots and a simple test of "Stalker: clear sky" DX10 Demo. Unlike the "Stalker: clear sky" E3 demo news from our PCZILLA, this "Stalker: clear sky" DX10 demo indeed has the DX10 mode, the effect of it is much higher than the E3 demo.
 
According to the tester, "Stalker: clear sky" DX10 demo from internal testing procedure.  The official version of the game will be released at the end of this year.
The greatest improvements of "Stalker: clear sky" DX10 demo over the original E3 demo are the accuracy of models, textures and light displacement mapping resolution increased. The weather is changed for in line with the principle of natural weather, enhanced the indoor illumination, and added a GI global photon rebounding system and replacement texturing.
 
The configuration requirements of this demo are very high, according to the tester, the demo is very unstable, the fps is varying from 12FPS ~ 60FPS.

The test platform is as below:

Windows Vista
QX9800
2GB DDR2 800×2
9800GTX SLI