Shped is using a zero-based index (normal "C" behaviour). So
87 is 88 i.e. pixels 0..87. SHPED is not our code, it is a third party utility provided for your convenience, with permission.
Mobhack adds 1 to give an end-user friendly result and not what makes sense to C programmers
. End users tend to count from 1 up, not zero and up (the offset from the initial pointer index). That's why I report weapon slot 1 to 4, and not the 0 to 3 the game thinks they are, forex.
If replacing an existing SHP inside a SHP file then you have to use the
exact same size. The icon sizes are hard-coded in internal game data. Your 89 pixel bitmap will likely have been packed into the space expected of the 88 square, so its going to produce weirdness.
Andy