Specifically can I just cut a hole through it?
I had planned to have an elaborate set of tunnels underground with a hatch that led above ground but when I went to punch my hole in the terrain for the hatch I realized that using the sculpting tools like Surface etc., all I can do is hollow out the terrain ... meaning that I have to carefully follow every pipe underground all the way to the end to keep from walling off my tunnels.
Is there a simple way to just cut a hole in the terrain?
For instance if I wanted to run a pipe through a mountain could I just put the pipe through the mountain and somehow stamp a hole through just the two sides of the mountain rather than burrowing all the way through?