Alot of it is like others have stated they changed the engine to fasilitate there promise to port the game to the ps3 and later the ps4 and since then they have been slowly upgrading the engine to get back up to that lvl of look. Part of the problom with 1.0 alot of pcs couldn't even handle the game it took alot to run it ,it was ahead of its time in that regard however tech is catching back up and there planing for a graphic update in 4.0 and I can only asume more to come after that soo it might get back up to that lvl or better