I removed this skull from a corpse but did not unlock any of the skull-related crafting recipes. The graphic shows a fully developed skull as you can see in the screenshot, it is not the underdeveloped hearthling skull, which I'm aware does not unlock the recipes. Also, per the wiki, the player's skull must have at least 50 intelligence, and the mental weight is intelligence/2. So in my example, the MW is 44, so the player would have had 88 intelligence. The wiki also says that they needed to have 100k LP gathered in their lifetime, but that the LP gain is 1% of the total LP earned for that character. So in this example, it gives 33k, which means their total LP would have been around 3 Million LP. So as far as I can tell this skull meets all the requirements for being a "real" skull. Are there any other reasons I would not have these recipes unlocked? (Yes, I have all skills unlocked including rage, murder, etc and have discovered all other materials needed for making skull cup, skull pole).