i was wondering if someone could explain how to do a forked tunnel kinda like (=======<) that or jdawgg/wyatt make a tutorial for it, because i was hoping to make a map that had a split tunnel. thanks for all the help

Well I've got a really complicated way. Some one will most likely come in here and tell me their way is better (which is probably true) Just make a big block of caulk texture and clip it to make the tunnel. Delete the excess so that you have a "rainbow" looking thing thats made out of caulk. Now texture the inside with anything you like and stretch it to as long as you like. Now copy and paste the "rainbow" and rotate it on the Z axis at an arbitrary angle, whatever you like. Now you have to be crafty with the clipper tool and clip the rotated "rainbow" to work with the original rainbow. Now just do it again for the other side.

Some one will probably come in here with a better way involving patch meshes and the patch mesh bending technique, so I'd hold off till an expert gets here.

You could make it as a model...

here, 10 min with some chosen words for the patches I used. Its not hard to do if you know how to manipulate patch meshes. I think I used all 3x3's for the tunnel walls. Its very simple but I did it to show that its not as hard as you think.

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Heres a download link from yousendit.com, its good for 7 days from when I posted. Its hte prefab in the picture for your viewing pleasure.

http://s37.yousendit.com/d.aspx?id=2LSUIL2N3S7O70LOHV688M5XK5

Use terrain mesh, less complicated and will not toss errors.

ok, thanks a bunch amishthunder, and ill try it out

Doesnt you get stuck if you place a terrain patch vertical and like "touch" it?