Downloaded over 20,000 times (on Thingiverse) Fancy Skull 2 says close your eyes and listen to his secrets... His secrets include a 4%+ infill and maybe supports, and perhaps something more sinister... but that's between you and him.
If you want a high res version, you can find it here:
https://www.myminifactory.com/object/3d-print-fancy-skull-2-95906
If you want a planter version, you can find it here:
https://www.myminifactory.com/object/3d-print-105490
Painting tutorial can be found here:
instructables.com/id/Creating-and-Painting-an-Ancient-Artifact