ok, this is in general, because it's sorta 3d editing, its sorta texturing, and its sorta wrpediting. what i need to do is take the paved roads that are included ingame, and make my own intersection. they're .p3d, so i have no clue how i would edit them. also, will i need oxygen to do this? if not, how would i make a believable 2 way intersection using wrpedit?