And now for the basin.
I scale my half-sphere from the top view to match my photo reference.
Remember to flip the sphere's normals because we're using the "inside" of it.
I extrude the sphere's top edges so the basin part tapers into the flat surface above it.
I extrude one more time-- this last row of polys is flat-- it occupies the same plane as the top part (the part unselected below.)
