Also, even if a file has a .bmp extension, that does not mean it is necessarily a bmp. Back in the really old days of Soldat where Soldat supported the png file format but didn't recognise the .png extension, modders would commonly take their png files and give them a .bmp extension so Soldat would understand it.
That's a slightly useful fact if you're planning on digging through old mods and editing them.
