Tried this myself…. made some parallel marks on my thumb using a cd case.
The apparent angle of the lines depends on the angle of the view plus straight lines on a curved surface look curved – you can make parallel lines or convergent line from tangents of two arcs.
The other photo taken from a different angle looks close to parallel but even that photo angle is not the best.
Tsk.
Smartass.
Tried this myself…. made some parallel marks on my thumb using a cd case.
The apparent angle of the lines depends on the angle of the view plus straight lines on a curved surface look curved – you can make parallel lines or convergent line from tangents of two arcs.
The other photo taken from a different angle looks close to parallel but even that photo angle is not the best.