Help with development

[Jack156YT]

Hello! I am having problems with my " Luffy " Mugen character. The thing is when I try to go to palettes Edit and choose " Open image "
And then I try opening my .bmp file and it gives me and error called " Bitmap image is not valid. "

Please help, I really wanna continue creating this character.

Thanks in advance.

- - - Updated - - -

By the way I used a sprite sheet decompiler
And then I realised they were PNG
So then I held shift and right clicked the folder with all my sprites
Then I clicked " Open command window here "
Then I typed in the command bar:
" ren *.png *.bmp "
And then it changed all my png files to bmp files.
And then I try to use it in the fighter factory classic
and it gives me the error shown " Bitmap image is not valid. "

[mulambo]

Use PNG files with 256 colors palettes instead of Bmp, BMP format takes a lot of space if you're going to have many sprites (and probably you will). Also Fighter Factory supports PCX, so you can try it too. Check the other thread in this forum for resources (including graphic programs) to know which programs may be used to make indexed sprites.
Another basic tutorial to get started with MUGEN development: http://www.elecbyte.com/mugendocs/tutorial1.html