It’s actually weird to say that UI is a picture. UI is a User Interface. And when you design it, you take User Experience into consideration. It’s not like UI is just how it looks. UI is the final product, and UX is a huge part of designing it. There’s no thing like focusing specifically on UI or UX, Because they are two different things, one is a product itself, and the other one is the way it works. There are just good interfaces or bad interfaces.