Moai Head Mold

Original 3d image by Geoffrey Marchal.
https://www.worldhistory.org/image3d/235/easter-island-moai-replica/

This is a 9" tall 1.4mm thick shell of a Moai statue used produce a concrete or resin casting.

I recommend using a minimum support overhang angle of 10-degrees (touching print bed only) and using a support blocker for all but the first inch or so to provide adequate contact area with the print bed.