Well, like the title says, I made another terrain and have tested it using npc's, they don't fall through, just look at the screenie.
But, instead of making a bunch and finding out that they don't work for you guys, I just made one using a different method, namely making them thicker and trying out 3ds Max.
To use these, you will need only your PageUp and PageDown buttons.
So test these out and post back here problems.
This one unlike my past ones is a mere 150 pollies, so you shouldn't have frame-rate problems here.
Also, i am aware that the texture is complete crap, but i can easily fix that later.
Oh, i forgot to mention, download it from the "Other Stuff" section of my website.
Raptor Games