I am localizing the interface for this game to another language and I am having a problem while redrawing a bmp image because I cannot get the background transparency. The problem is that the game engine only works with bmp format, so I cannot make the background transparent by simply replacing the png file.
I found that the alpha channel of the transparent background for each of the bmp files is stored separately in alp format. Are there programs to create a transparent alpha channel and save it in alp format?