So...it's RF1's underground caves all over again? I like it.

Does this mean that we can create endless cave tunnels again, like everyone who played the first game did in that demo map?

And then never did in-game :p
That was my complaint with RF. You rarely used the geomod over the course of the actual game. It was almost exclusively used for goofing off. Hopefully this one will be more Guerilla-esque in terms of actually USING geomod (even if that was restricted to non-metal buildings :p)