i need help, something is wrong with the game!?!

[frechdachs971]

i did that and i checked if it worked, i even restart the custom story to reload the whole thing, it still doesn't work, i even checked if there is a thread about this and i found a thread, saying something about skybox problem, coming from the 1.3.1 update and i tried to downdate the version to 1.2, but after that, i couldn't start the game, so i needed to update the game back to 1.3.1 to make the game work again, after that, the custom story is still having problem, what do i need to do now, i want to play the custom story correctly and properly