This page is an entry in the Key.
non-optical perspective correction
(Always disqualified by TTG; see P2)
This term refers to any and every non-optical means of reshaping the depictions of things in a photograph in order to change the apparent perspective (i.e., to make it appear that the camera was pointed somewhere other than where it actually was pointed).
As per Q2, every kind of “reshaping” of things in photographs, for whatever reason, disqualifies photos from TTG
. . . with only one exception: the only reason anything may ever be reshaped in a TTG photograph is to correct barrel/pincushion distortion (that's part of #4 on the list of Allowable Changes).
    
  
Further reading
• TTG's disqualification of all “non-optical” methods of “changing the apparent perspective” includes both digital and darkroom tools
• “Non-optical perspective correction” is disqualified by TTG because there is no way to put limits on it
• How do TTG photographers make “perspective-corrected” photographs if they can’t reshape things after the light from the scene passes through the lens?
