I’ve needed a nice clean skull in my own TTRPG design work, so I expect a few others might, too. That was all the reason I needed to grab these chaps from the excellent archives of the Wellcome Collection. The image of four skulls, each angled differently, is dated 1700-1799 and is marked as public domain. The original artist of this line engraving is unknown.
My alterations of this piece are licensed under CC-BY 4.0. So you are free to use them however you wish. More info on licensing from Artwash can be found below.
I’ve made a transparent and a black and white version for the skulls and separated each one to give you the most flexibility when putting them into your projects. Enjoy!