ORIGINAL: UStik
Cees, maybe you could persuade Andy by explaining why you show lines that are parallel and not focused to the point-of-view. After all he pointed out that distances nearer to the pov look bigger than those farther away. So in the crate picture the fuselage nose appears to be short and the tail long, and it seems you didn't take that into account.
You are right UStik,
I did use this method for a "fast check" not to copy the Frank Myers plans.
" parallel and not focused to the point-of-view."
When parallel this is theoretical with the point of few "between the stars".
When there is a difference in plan and reality at least one of the lines crosses somewere another on a other place than in the point of few, where ever that point of few is.
You allways find positions and an angle so there are three lines parallel.
You must do this check with at least 4 lines!
So where ever you make the point of view you can do the check.
To copy the reality the distance to the point of view is most important.
The picture of the crate is realy a "Box of Pandora" because the crate is on the picture there are references all around the fuselages to calculate everything because all the lines are straight.
Even when you know the POV there is a lot to calculate.
Example: we do not look exactly on the top of the fuselage! there are a few degrees so I can reconstruct the fin.
The picture of the crate the most important Snap Shot? No Ed could not have made this picture better!!!!
To give some extra information
A picture shows us more than hundred words!
Picture 1, Camera Obscura also inverted
Picture 2 point of few the fuselage in the crate.
Picture 3 Old as the way to Rome, without lenses
Cees