Might be a silly question. I am using TexturePacker to export texture sheets for my Cocos2d game.
At the end of certain levels I want to display a special image that tells the user that a new world is unlocked. I thought to create a single texture sheet in pvr.ccz RGB4444 format using some useful Dithering algorithm to optimize the alpha information in the image.
However I am wondering.. is this the best way to include an optimized image in the game? Or should I use GIMP/Photoshop etc.. to optimize and export it?