Fifi,not sure if this goes against the hardcore aspect of NYGM but you might take a look at this mod that simply makes flags brighter.Just now I was doing some night attacks with it and its superb but it also fixes the issue I have that in broad daylight a flag is hard to see when the sun is at its back.A compromise is needed and off I went in search and a 2009 gem was found in a mod by Rubini and Diving duck(who found the emisive property) in flags.dat.
https://www.subsim.com/radioroom/sho...d.php?t=152479
https://i.postimg.cc/wBYJWhBK/SH3-Im...-44-40-451.jpg
https://i.postimg.cc/g017ttZz/SH3-Im...-49-51-831.jpg