Textures are stored in a DS-specific texture format. No problem, because a converter is included in the tools folder (if you don't have a tools folder, you need to download the "+ Source" release). Open up a command prompt and browse to "tools/texmex-0.04". Then run "texmex format filename" to convert the file. Replace format by -1 to convert to A3I5 format, -6 for A5I3 and -4 for RGB256.
A3I5 3-bit alpha, 32 colors A3I5 5-bit alpha, 8 colors RGB256 no alpha, 256 colors
We want to use chen.png as our boss texture. So first we convert to the format we want (A3I5 in this case):
texmex -1 "c:/temp/chen.png"That generates two files: chen.dta and chen.pal. We copy those to "games/game_template/normal/stage1", and open "games/game_template/normal/stage1.ini". Then we add the line:
tex_boss=chen:A3I5to override the default boss texture with our new image.