The basixgfxcs.zip file you have requested: Clear Sky / Mods / Singleplayer / Basix GFX-CS - 137.65mb is not available. Perhaps try browsing all files for the game S.T.A.L.K.E.R.: Clear Sky and upload any files you want to share or are missing. This is the only information we could locate:
Basix mod for Clear Sky ... finally. It includes most of the features that Basix SHOC mods have been known for, such as, the weapons expansion mod, environmental graphics pack, rebalanced NPCs, more blood, different weather, etc. This could work with 1.5.04, but the mod includes new files from the 1.5.05 patch. See more in the ReadMe.