Two things. First, it appears that the spec doesn't specify the units for the angle. However, since it is designed to be easy to use for part authors, I feel that it should be degrees.
Secondly, Phil's suggestion of what the sphere should look like may be correct, but I'm not sure. I'm not having any luck wrapping my head around the description for the spherical projection.
Secondly, Phil's suggestion of what the sphere should look like may be correct, but I'm not sure. I'm not having any luck wrapping my head around the description for the spherical projection.