Reddit reviews Secret Knowledge (New and Expanded Edition): Rediscovering the Lost Techniques of the Old Masters

Because it’s boring and that’s why we have cameras. Why draw if you can’t bring something new into the world?

The way the picture was rendered it’s also likely traced:
https://www.amazon.com/Secret-Knowledge-New-Expanded-Rediscovering/dp/0142005126

correct! I think a lot of old techniques are explained in this book
https://www.amazon.com/Secret-Knowledge-New-Expanded-Rediscovering/dp/0142005126

Also check on David Hockney's Secret Knowledge, if you find this interesting

Wait till you see this

Basically the Old Masters had a bunch of aids like this that helped them create sublime, photorealistic renderings in oil.

A lot of the best literary works can depend greatly on your background. For example, I have many friends who are technicians of one sort or another, so technique was one point to strengthen their connection to art. I might get them to watch Tim's Vermeer and then read David Hockney's Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters. I understand that these assumptions about technique are still theory, but many find it interesting and relatable.

Painters have always used various optical devices, I dont think it detracts from their painting, its just another tool.

Its the Hockney-Falco thesis that you are referring to, he discusses it in depth with proof in this book, its an interesting read, Id give it a whirl if I were you.

Actually, all you need is a projector. That's how this sort of thing is done - much like paint by number without the outlines done for you. You might like David Hockney's book Secret Knowledge about the use of optics in art.