There is an stl of a "hemidemi" on the internet. It is a solid that is one-fourth of a sphere.
Todays project, or challenge, is to create one in MoI.
Hints:
Start with the baseball curve script. Use mirrors, array curve for center of curves, cone lofts to a point, boolean intersects, boolean unions,etc...
(I lowered the mesh angle to 10.)

- Brian