Decals

Maybe you're not happy with the black box with the crossbones inside or you would rather not have a square decal but want a circle one instead. That's possible if you can edit the alpha channel of an image. The downside to transparent is that though they are still constrained to 5KB, they have more information. So something has to be sacrificed to make these decals work in game. In this case, the decals can only be a quarter of the size of normal decals, 32x32 pixels (or with some more restriction of the decals palette, can be kept at 64x64). That means the picture will be even less detailed.