What methods should I explore for creating curves on a UV sphere to extrude? I’ve been selecting faces and extruding them inwards but this is squarish and I’m not sure how to control the elliptical shape which I then plan to extrude in. I have also tried creating tri’s through the faces to get curvature but the lack of angling control over the top and bottom lines is frustrating. Is there a method to draw such a shape and then extrude inwards?
Here’s a sketch. Note the ellipse in the sphere. I’m trying to get this sort of shape and then (maybe?) extrude inwards with some beveling or subsurf to round it in.