Having problems making a custom map

So, I've been playing around with the map editor, and I've managed to figure out several things on my own, like better camera control and making the map symmetrical


I've set up a bridge over the water, and a series of tunnels, plus random 10-height pillars for AIR units to jump between.

The only thing I'm having problems with is the ramp that leads down into the tunnels, and a very tiny but noticeable missing section of the bridge where it connects to the land


I've had a few people test it, and we've found some interesting things about the tunnel entrance

-If a bot flies into the tunnel and lands, it will land in some kind of invisible water, even though there are tunnels leading down, and nothing visible
-However, if the bot walks down the tunnel, it will not run into any "invisible water"
-I can't figure out a way to hide the outsides of the tunnels so that it appears natural and that people can't phase through the walls into the tunnels

I have tried lowering the cave entrance and so that it starts underground and I don't have to use ramps, but no matter what, the entrance doesn't want to work with me
All of my attempts have ended up with the map pieces being oddly placed, or a large noticeable chunk of the land around the entrance and normal land being missing

Spoiler:

Picture is linked from photobucket, couldn't get it to attach because it was larger than 0 kb

I'v had that kind of problem but there's not much you can do (it's the cave really) you can try hiding it with some kind of item

Pegtor, please look at the dates before replying.
This thread is over 2 months old.