Blender Ground Collision

So I started to make my terrain, After setting up all my basic things. So I decided to quick use blender to make a terrain. Problem is, I’m using Yabee Exporter, And it doesn’t automatically do the geometry.

Not only do I not know how to enable the fact it does it for me, But I have no idea how to do so manually.

Any help at all would be much appreciated for a Blender noob. Thanks guys!

Sorry guys, I was being a huge noob.
I didn’t quite understand other posts about this,
But I did further research, went back to a post about it I read (The one I didn’t understand) and was like, “Ohhhhh! How dumb of me not to understand such a simple concept”. Haha, Thanks anyways!