Simply add a 1x1pixel black square to the parts that you don't want.
There is a skull with a top hat, a doll's head, a cube or dice, and a parrot or bird head ... many possibilities, for example; if you use my opacity on the skull, you can put the hat on the doll head.
Maps
Doll head:
Skull:
Parrot:
Dice:
Hat opacity: