Assuming you change an infantry animation by renaming a particular file, say "mp40-reload-c-kneel.ani" to "mp40-reload-c-stand.ani", which will result in the MP40 reloading magazine standing stance, change to reloading MP40 magazine in kneeling stance ingame(tested and works). Now the question: Is the particular soldier still registered as "standing" for LOS/LOF to the OPFOR? Or in other words, ...is standing, kneeling and prone stance "hard coded", no matter, what animation actually is played?