Awake again, and still generally over 10000 walls to shade in such case, or i'll atleast do most of them with a light in the area.
But other then the shading, some idea's cant harm.
The map is simply the standart taken over by alien base, duke gets sent and all hell breaks loose.

Also made for Co-op.
The map is generally one of those middle levels, without boss or anything, but neither too easy, might fit decently in an episode, perhaps.
Ah well, back to work again, though i wont be very fast at it.
Oh, and i do alternate the floor in the metal area's a bit, either the same for bars, but used differently, or one of those... uhh, other things. Though didnt use alot other types along with the bars, though.
And the board isnt that slow either, or atleast far from death.

Hmm... First things first, im hungry! Cant edit without some food, hehe.
Edit: Now im rather stuck, i want to make an working door inside an two way train! Ive tried a floor rising sprite, with 2 activators, but it doesnt even respond! Does it only work for doom doors? Or are there alternatives, i do want the door inside the train. Its going to look bad if in the long tunnel i have to block off the entire door side.
Hmm... I do remember a force field trick, but that's somewhat one-time, and else difficult to impossible to time with the train, i guess, if using it back and forward.
Oh, and i cant make a doom door in the train, because the train's roof is made of sprites, and it would look unaturally and ugly to make the entire middle of the tunnel lower for the door.
Edit2: It also requires another tag and would make it loose and perhaps buggy from the train, i think.