Hello! I think I 've discovered a bug in v1.6+1.6 Game Data
I was experimenting with map editor, with players in post-Imp.
I had a player3 being allied to the players 1 (khmer) and 2.

Even with 3 being allied with 1 and 1 allied with 3, khmer couldn't see his ally's vision.
I changed quite some civs to player 1, including Burgundians ("new civ"), and they would see allied vision normally. Only when it came to Khmer, Khmer had no vision.

Thank you!

Thanks for noticing it. Apparently, Cartography was not correctly linked to feudal age, which prevented it from being researched automatically in later ages. On all other civilizations, the market requirement took care of it but, I assume due to the building bonus of khmer, it was not working.

It's fixed and I'll update when I have time to investigate another problem with the organ gun.