"What are you trying to do with the portrait? On a basic level, you're trying to communicate something about the essence of who someone is. You're trying to figure out who they are, not necessarily who they present themselves as. The two things can quite often be different. And then, you're trying to find ways of showing that through their face, their posture, or any other context. My instinct is always to try to reduce down to the essential elements. We read faces. It's obviously very, very deep in our DNA, really our survival instinct. We are programmed to read faces in a very fine-tuned way. Painting is a two-dimensional thing. You're basically taking real, three-dimensional things and making them into fake, two-dimensional ones. When you get into the 3D space, some of those distinctions aren't there anymore. I remember when I showed David Hockney the VR project I'd been working on a few years ago, and he put his finger on this quite well. Most art is about perspective. Certainly, for what he is interested in. As soon as you see something in 3D, whether it's a physical sculpture or a virtual object, that's not there anymore because you're in the space with whatever's being shown, so you're in a very different place."