HorvatM has just released version 1.1 of his "Multiple BMP to BGMap/charset converter". This version was used to develop Coding Competition entry "Deathchase".
Now also supports 32-bit BMPs.
You can convert BMPs to charsets "one to one" without generating BGMaps (useful for fonts).
The number of new unique characters for each BGMap generated is reported, along with a total at the end of the conversion.
If an exact color match isn't found, the closest one is used (thanks to RunnerPack).
The BGMap buffer is now cleared before converting each BMP (reported by thunderstruck).
The program now checks for the 2048-character limit before adding a new character.
Updated the LoadEfficientCharset and LoadEfficientBGMap functions in the readme with those from Deathchase.