I actually bought this set before it was sold through Roll20 and then imported and resized it for a zombie outbreak game (using my  <a href="https://marketplace.roll20.net/browse/set/186/mode" rel="nofollow">https://marketplace.roll20.net/browse/set/186/mode</a>...  set) and giving players only some torches (using dynamic lighting) so they had to work together to find the route out of the city.   It worked beautifully, and these tiles made it so simple I had it set up in minutes.  Thanks Simon/Dramascape!