The Last Supper 16 gigapixel image

The team from Haltadefinizione has once again created a very detailed image of a large painting, this time it's The Last Supper by Leonardo da Vinci.

While always impressive, I think a limit has been reached, because higher resolution (and thus more gigapixels) would not allow for a better detail, as they have reached the point where at maximum zoom, we can only almost see molecules of paint...

To give an idea, the painting is 880x460 cm while the image is 172181x93611 pixels, so each pixel is only 0.05x0.05 millimeter...