1. The TTG photographer has to record all forms and shapes pretty much the way they want them to appear in the final photograph, because — except for a select few allowable changes — all non-“light”-related aspects have to be left exactly as they were recorded. (See P2 of the Trust Test.)

2. TTG photographers have to forego applying their personal “style” if that style involves changing the look of the photograph to something other than “what the camera lens saw” (as judged by rinairs in P7 of the Trust Test). More

3. As this page explains, TTG photographers can retain most visual effects that were caused by things that affected the photograph during the exposure—

—but after the exposure, the photographer cannot doctor the photo to simulate those same visual effects.