[Jay Mofo Mills]

As a side note in reference to creating tunnels/archways

One extremely annoying problem with subdividing to create your arches/tunnels is that little invisible edges will clip the player. Prob not a huge issue if its a roof but its really annoying to conc along the edge of a rounded wall and hit invisible edges because of subdividing. You can also get stuck just running along them.

I would recommend using the arch tool whenever possible because a.) it always puts your vertexes on the grid and b.) you dont get those little annoying invisible corners.

Unless of course you have extremely crazy shapes you need to subdivide for, or they're not in a high travel area.