S.T.A.L.K.E.R. using unlicensed assets from Doom3?

segafreak writes: "ShackNews reports that S.T.A.L.K.E.R.:Shadow of Chernobyl may contain unlicensed assets from other commercial games such as Doom 3 and Half Life 2. Though this has yet to be confirmed by any of the developers involved, if true this would be somewhat worrying. Maybe its time to buy the game while its still on the shelves!"