Couple things: how do you export JSON file from MFCG?
Also for the City Viewer I would love the ability to get the whole scene when exporting not just the buildings.
PS. I'm loving all your tools! I'm using them as blockout tool for Unreal maps. Also I'm thinking the Village generator map image would make beautiful in-game map and/or image for a in-game "you-are-here info-stand".