Whenever i am trying to run S.T.A.L.K.E.R on full screen mode,whetever be the resolution,the distant objects like trees,sky,roof of houses etc are all mixing and the game becomes unplayable,but when i turn off the full screen option,i.e windowed mode,the game is running smoothly with clear and bright visual effects even with all graphical options at their maximum.My system is4 2.4ghz,1024mb ram,geforce6200(256mb)card with latest driver and directz version.can anyone suggest me a remedy?