I see you are playing around with a lot of shader effects. One of the nice things for you all is that your scene is really static you don't need to worry about visual artifacts when you rotate it. I played around with a lot of the same shader stuff you are looking at a while back for my own interest and had a hard time because a lot of the things that looked good replicating what paint does in real life had a hard time looking good when in motion. But you don't have a lot of motion, so I say lean into it and blend between the effects you are playing with based on who is talking, how the conversation is going etc... afterall different people see the world differently, and you can represent that visually really well if you have a few of those effects down