I sculpted this model on an iPad using an app called Nomad Sculpt. Fair warning: I've only been 3D printing for a few weeks now, and I'm no expert in 3D modeling. However, I printed out the skull on my MK3S without any issues in a few different sizes. Printed in Prusament Galaxy Black.
I oriented the model with the tip of the nose on the plate and the horns pointed upward. I painted on minimal supports at the base of the skull, and in the nose and eye sockets.
Enjoy!
The author hasn't provided the model origin yet.