At the moment I am playing around with perspective
correction on a PC.

Although I manage fairly wel with trial and error, I
would like to have to guidelines and or rules how
to work.

So do you have a workflow, guidelines or rules
when correcting perspective.

A rule could be if the picture is not possible with a
technical camera you should not make it with software.
But how do I prevent making pictures which are not
possible with a technical camera ?

Thanks for your time and attention,
Ben Brugman