I've got a simple cylinder and a sphere boolean, I'm trying to create a smooth ridge like in the following annotation. This seems like it would be pretty straight forward but I can't seem to figure it out. Any ideas?
A possible way to do it.
Start with a relatively low resolution for the cylinder and the sphere (16 rings here). Duplicate the mesh and apply the boolean on it.
Keep half of the object (we'll mirror it later), and simplify the mesh removing some edge loops in the sphere part and joining the vertices that are in proximity. Also add rings/cuts on the cylinder.
Below before and after:
Make the cut for the ridge using the knife tool:
Add a mirror and subdivide modifiers. Push the ridge and bevel it.
For bottom and top part, make the faces and inset them:
Next step, cleaning, make quads from ngons and tris, for top and bottom parts:
To harden the ridge, you can select it and crease the edges:
That can give you this: