Olivia is drawing this pick-’em-up-truck from a photo of mine. There was a little bit of ambiguity around the door handle. The magnifier/loupe/linen tester/bug identifier is so helpful when the photo isn’t giving up its secrets. I peered through and said – “Oh! The gas tank had a sticky-outy thing with a round cap on top that we are only seeing in profile and it is right next to the door handle”. Good thing I was born in the ’50s so I could explain it to Olivia (although October of ’59 hardly gave me much experience in that decade.)
Know what you are drawing because if you don’t, those who know will know that you don’t know.