Apologies for the slightly off-topic, but I was wondering if anybody knew of a paper/textbook where a protein model was built by multiple people (ranging from novice to experienced builders) and compared. I believe the conclusion was that while the overall trace was broadly correct, experienced builders maintained better geometry compared to beginners.

I distinctly remember reading it a couple of years ago but cannot seem to find the figure. If anybody knows of this figure/paper/textbook it would be much appreciated if you could point me in the direction.