if you want some really simple walls then use "Plains"
you can make them in DB with code like this (i'm just putting this here to be very explicit...)
`this will make a 100*100 plain you can change the size and the ID `(set at 1)
Make Object Plain 1,100,100
you can make a plain with that and then rotate to a vertical position using...
You know, when i see an old lady slip and fall on the side walk, my first instinct is to luagh, but then i think, what if i where an ant? and she fell on me, it just doesn't seem so funny anymore.