This texture pack requires optifine to work, this texture pack adds to Meawscles and its 2 versions, when you give the name tag to a black cat, Meawscles will take the skin of Meascles, the cat in the middle of the photo.
if you put Meawscles Dark on the same cat it will change to its dark version and if you put the name tag of Meawscles light it will take its light version of it