Forming a niche in a curved wall

Hi I need to create a curved niche with a half dome ceiling cut into
a curved wall. Is that possible with SU?!!?

Yes, in simple terms create the two shapes and intersect them then remove the bits you don’t need.

Here’s a random one.


Superb! Thank you.

Makes it look easy, doesn’t he!

Yes there’s a real skill to presenting succinctly. Beats
watching a youtube 5 minute tutorial.