This particular article emphasizes artistic interpretation. Another viewpoint is suggested in a New Scientist book review on the subject:<p><a href="https:&#x2F;&#x2F;www.newscientist.com&#x2F;article&#x2F;mg22630152-300-eye-of-the-beholder-life-through-the-camera-obscura&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.newscientist.com&#x2F;article&#x2F;mg22630152-300-eye-of-t...</a><p>which considers the possible use of lenses and a camera obscura arrangement which would have enabled direct tracings onto the hemp canvas or parchment at the time (wonder if they toked it?).