Match View Background in form•Z Discussion Posted May 25, 2016 "If lines that should be straight in the photo are curved, then it is too distorted to match view perfectly." Mastery is often a game of knowing the tolerances for imperfection. Not knowing them, I went with the speculation that since I was trying to fit the model into a narrow angle of the total angle of the scene, the curvature *might* be relatively flat and workable. Zoomed in it all looked rather straight. In fact, prior to solving, I saw red lines on the image which corresponded to the straight lines on the model----and they occurred on the lines in the image I expected them to. What I couldn't figure out, was how formz seemed to understand where it was supposed to put the model edges, and they looked straight, but when I solved the match, it didn't put the edges where it indicated it would. If those lines were actually curved, then in connecting them formz must have drawn them curved, since they matched the image in which the lines are thought to be curved. And yet, it didn't seem plausible that formz was drawing the lines curved. Finally, the mismatch in the solution was major, not subtle. As always I appreciate the help from the formz crew, you are such a great resource. I have since done matches on more normal photos and it works pretty much as advertised.