{add link to non-optical PC}

• When recording a photograph,

TTG photographers can position and point the camera wherever they choose, knowing that they are committing to the exact “perspective” that the camera lens is seeing when the shutter is clicked.

• But a photograph is ALWAYS disqualified from P2 if, after the photograph is recorded,

the depiction of anything in the photograph is reshaped* to make it look like the camera had been positioned or pointed somewhere other than where it was actually positioned or pointed during the exposure(s).

This reshaping is commonly called post-exposure “perspective correction” even when notions of what is “correct” perspective may vary wildly and even when only vertical lines are “corrected” and horizontal lines are not.

This disqualification includes post-exposure reshaping that was programmed pre-shutter, such as Leica’s electronic “Perspective correction” feature and its smartphone equivalents.

See also #4 in this brief.

*The only reason anything can ever be reshaped in a TTG photo is for correction of lens/camera anomalies, which is #4 of TTG’s Allowable Changes. {Say "bpdc" and rule out rolling shutter?}

Further reading

#911. How do TTG photographers make “perspective-corrected” photographs if they can’t reshape things after the light from the scene passes through the lens?

“Why doesn’t TTG allow my favorite manipulations?”

TTG’s policy on “Perspective correction” is an example of “seen vs. simulated”

“Camera shake” and “panning” do not disqualify single-exposure photographs from TTG