For my interview last year, you will get 2 interviewers. One of them will be the fierce one to scare you but they are actually very nice hahaha.
It was quite casual for me, like a chat. Before interview, you might be asked to draw something about yourself. Can bring your own material. They will ask you about artist you like. And talk about some example. They will look at your background and ask you questions about your work and yourself to find out your attitude.
At the end of the day, do not give up hope if you feel like you screwed it up. They intentionally make you feel like this. And remember, always ask them questions at the end of the interview as if you are getting a job. Be proud of your work. I was very lucky to get in even though i refused to show my Fyp from poly when they asked xD