opening

I am building a frontline payload map, and the cart track curves in a tight L shape around the first red spawn. Now to insert a much needed flank route I could just jiggle the spawn around. But I was thinking, Sense I am already exploding half the spawn with the tank cart, why not delete all the...

So I made a set of doors to use for one of my maps, but I wanted to know if I am able to make them open to the sides, like the right side of the door going right and the left side of the door going left. I have never tried doing this before and I don't seem to know how to do it, I would love...