Originally posted by Major FlareDude, 4bpp means 4 bits per plane. In short, whenever you use an image, it is better that you use only 16 colors, in order to take an entire palette row for SMW. If you use more, you'll need more palette rows; but SNESGFX pretty much handles it nicely to you.
It tells me a error that I have
There are more than 1024 (0x400) tiles, thus it's impossible to generate a SNES tilemap.
My released ROM hack:
Yoshi Saves Summer Vacation