I watched a pirate stream of that new Tom Hanks movie about the Battle of the North Atlantic called "Greyhound". I heard it was supposed to be faithful to the CS Forester source novel, but some elements of it didn't seem so realistic to me. All the ASW destroyer/convoy stuff felt more or less right, but the behavior of the U-boats seemed very off in parts. I've only ever watched U-boat movies and fiddled around with some U-boat sims, not read that much about first person accounts or tactical analysis, but it seemed weird that the U-boats were constantly surfacing in order to recklessly press the attack with deck guns when it would have been more prudent to just cut and run or at least wait for a more opportune firing solution to present itself. Also it bothered me that the "pin-up" art on the U-boat conning towers was way oversized and one "pin-up" was just that modern stock-photo design of a totenkopf wearing an M43 style cap (see image
here). Spending millions on the advanced CGI water effects and modeling for the movie, but spending 0 to use a royalty free clip-art design that is plastered all over shitty Chinese-made "repro" merch on AliExpress and is basically a creation of some modern day graphic designer with no historical basis. I thought it was pretty clever to use the "pin-up" art to visually distinguish the different U-boats, but they should have paid for their own original designs and made the "pin-ups" a bit smaller, like how it was done historically.
@MrJokerRager since it sounds like you play War Thunder, it looked like when in that game, players blow up decals to like 300% size and paste them on the side of their vehicles, covering all sorts of vital components. Just from looking at it, you know that historically it would not have looked like that because the painted design would be covering up access panels or hatches or other components that would not make sense to paint over because people would be constantly opening/closing/fiddling with those parts.