so tiles are not truly cubic once you include height? Hum.
Yeah I definitely couldn’t jump from roof to roof in my neighbourhood, and it’s just a residential area. There’s sheds and garages on a lot of people’s properties that I could, though. If My house was on fire There’s a bunch of shit I could jump to from the window to get down safely - in a city building of decent size, jumping from the window is a comparatively terrible idea unless there’s a fire escape. You just have difference uses for the skill in different environments.
…also one could add a very large Ladder item to the game, with the ability to place it across one roof to another provided they aren’t over a certain length apart. It would probably be difficult terrain but that’s an option for unfit characters should health come to affect jumping skill. (I think it should.)