Re: So they've made a more complicated scanner
If you read the article a bit more carefully you will notice that they did not use close up scans but ordinary digital photographs. The AI bit was to re-create the missing data, which is important.
Masks worn by actors have a blood red layer under the flesh coloured layer so the mask looks real under different lighting conditions. Painters use a similar trick: light can enter through the light areas and come back out through the darker areas to fool the brain into perceiving motion in the parts of the picture you are not looking at. I know that sounds impossible, but take a look at what can be achieved even without different coloured layers.
The only way to tell if the AI is doing a good job is to see the original and the fake side by side. Digital photos on a monitor are not useful - unless the artist designed for display on a montor.