How to make images?

[qq253673732]

I'm a new devloper for gba games.I create image by photoshop,It just show black screen.I know it 15-bit colors,but how to make this images.thank you.

[RoTob123]

You need to convert your image in 24 bit (i dont know why 24 when only 15). I'm using gimp for it, but try to find something like export with advanced settings. And also transparent background is 255,0,255