by UnimatrixRed
On Myminifactory there was a nice Jason mask designed by Alan Stanford (https://www.myminifactory.com/object/3d-print-jason-mask-full-size-2728)
and he provided the model precut as 4 support-free pieces you glue together. I remixed it into a whole version so it can be printed all at once. I also added a version with a cutout for the red triangle decal that sits above the eyes. The print in the pictures was done at 25% of original scale to be used as a keychain. If you print that small and use the cutout one, print the insert standing up on its wide side and scale down a few degrees for a better fit.