(Only my opinion) I think first option is better, as after you making SpaceTrain graphics, you can update and lately ignore it or so, (if you do not take into account that if in the future you may be have a desire to change something in SpaceTrain graphics, etc etc etc), And about Darkliner I mean, if it is stands on "elevated rail" <-- that offsets it's shadow compare with "elevated rails" --> The shadow of Darkliner is falling likely "around" Darkliner. <-- --> I mean when it stands on surface it is ok, but elevated rail offsetting shadow that was not include the "actual train" (It is hard to explain in text for me, It is easier if you build darkliner on "elevated rails" and see it yourself)