It looks to be similar to Nvidia Canvas - there's a good demo of that online. Basically the user paints where they want a feature to be using a colour. The AI

It looks to be similar to Nvidia Canvas - there's a good demo of that online. Basically the user paints where they want a feature to be using a colour. The AI replaces the colour with a feature and makes sure that any features touching eachother blend together beautifully to create a believable human face.