Currently (not even close to done) working on a rimworld mod to put the current map into the source engine with the press of a button, example shown up top. Had to learn c# and the intricacies of how to write a file in the vmf file format and create brushes from code, but I'd say it's been worthwhile. First pic is hammer editor view, second is the original rimworld map. BTW they compile without leaks, and it even supports water (amazing!!!!!!)