Minecraft wiki entry for Head, associated text: Marc Watson created a number of accounts with specific skins so map makers could use common heads without the risk of someone changing their skins.[3] Nowadays, since heads do not update the skin if a player changes their skin, this is not something map-makers need to worry about, though these skins are still useful. These accounts have names in the format MHF_<Name>, for example MHF_PigZombie is the name of a Minecraft user with a Zombified Piglin head. MHF stands for "Marc's Head Format".[4] There are also a few blocks and "bonus" heads, for more variety. These player heads have not been updated in compliance with the Texture Update, and are outdated.