When roof destroyed (in this case by artillery), at certain distance interior floors become transparent. https://photos.app.goo.gl/ZGsy1wLY5xD1X4Gw9
Also, not really visual observations, but the SA-80 has a very strange tinny sound when playing on mac.
Also, I am not sure why the Challenger isn't firing the .50 cal on target light? Does it need to open up to reload? https://photos.app.goo.gl/uw95RKKwxXqhx18p8