The Thirteen Rules Hold The Cut

R1 is the 30 degree rule and the rule is the hardest constraint in editing. A cut between 2 shots of the same subject must move the camera at least 30 degrees in angle AND change the shot size or the focal length. Less than that is a jump cut by definition, and the audience feels the jump inside 1 frame. The cheap gate is to write the angle change into the prompt pair verbatim. Shot 1 at 35 degrees right of axis, 35 mm, mid-shot. Shot 2 at 110 degrees right of axis, 50 mm, wide. The 75 degree angle change plus the size step satisfy R1 in 1 read, and the read is the cheap gate. When the camera cannot move 30 degrees because the scene is locked inside a small room, the fix is to change the size dramatically. ECU to wide satisfies R1 because the size step is perceptible and the angle can stay at 0. A prompt pair that cannot move 30 degrees and cannot change size is the failure that ships a jump cut, and the jump cut is the failure. R2 is the 180 degree rule and the rule is binary. Pick the imaginary line between 2 subjects (the axis of action) and every camera stays on 1 side of that line. A camera that crosses the line flips screen direction and the audience feels disoriented in 1 frame. The cheap gate is to write the axis into every prompt verbatim. Axis runs screen-left to screen-right, camera on A-side for shots 1 to 4. The axis declaration holds the camera discipline across the cut, and the held discipline is what the eye reads as 1 film. R3 is screen direction and the rule says a subject moving screen-left keeps moving screen-left across cuts until an on-screen turn or a re-establishing wide resets it. Consecutive prompts carry the same direction token verbatim: subject moves screen-left, drift left-to-right. R4 is the eyeline match and the rule says where A looks (frame position plus height) must match where B is in the reverse shot. A looks down-left at frame height 60 per cent; B is positioned up-right at frame height 60 per cent in the reverse shot. The eyeline match is the cheapest gate in dialogue coverage and the gate is what the eye reads as a real conversation. The 4 rules share 1 verb: name. Name the angle, name the axis, name the direction, name the eyeline. Naming is what holds the cut invisible.

R5 is cut on action and the rule is the cheapest gate in editing. Cut in the middle of a movement, not before the movement starts and not after the movement ends. The motion bridges the seam and the seam feels designed. The generated form is end shot N mid-motion and start shot N+1 with the same motion already in progress, same speed, same direction. A prompt pair that lands on the settle (the subject stationary, the action complete) is the failure that flags the cut to the eye, and the flagged cut is the failure. The Salvador montage uses R5 on the pair 7 to 8: hands gesture mid-motion at shot 7, face framed mid-laugh at shot 8. The motion is the laugh and the laugh bridges the join. The cut reads as invisible because the motion is the join. R6 is the match cut and the rule says shot N+1 opens on a shape or a composition similar to shot N's final frame. The match makes the change feel designed, not broken. Nolan cuts are match cuts: the spinning top, plane-to-sea in Dunkirk, the watch to the door. The cheapest gate is to write the match object into the prompt pair. Shot N closes on gold. Shot N+1 opens on gold in a different form (the hoops, the necklace, the pendant). The match holds the eye across the cut and the held eye is what reads as a designed change. R7 is the L-cut and J-cut and the rule says audio overlap covers the seam. The L-cut places the next shot's picture over the previous shot's audio. The J-cut places the next shot's audio under the previous shot's picture, before the picture lands. Sound leads the eye and the eye never sees the cut. The Salvador montage uses R7 on every cut. The Portuguese voiceover never stops, so every cut is a J-cut by default. The voiceover carries the eye across the join and the join is invisible because the voice is the bridge. R8 is bridging a jump cut and the rule says when 2 same-subject shots must sit adjacent with less than 30 degrees of angle change, insert 1 of 3 bridges: a cutaway to a different subject, a match cut on a different object, or a re-establishing wide that resets the geometry. The cheapest gate is to write the bridge as its own shot, never to morph shot N into shot N+1.

R9 is the shot-size ladder and the rule says adjacent shots differ by a perceptible size step. Wide to mid-shot to close-up is a ladder. Two identical sizes at the same angle is a jump by definition, and the jump is invisible to the editor and obvious to the eye. Dialogue reverse shots legitimately pair over-the-shoulder of A at matching size to over-the-shoulder of B. The OS/OS pair is the 1 exception: same size at same angle is correct because the subjects are different. A prompt pair that pairs 2 face CU on the same character back to back is the failure that ships a jump, and the jump is the failure. The Salvador montage uses R9 at the dramatic peak: shot 3 (street, wide) to shot 4 (lesson, close-up of girl's eyes). The wide to CU is a full size jump and the jump is intentional because the jump marks the lesson that stopped her. R10 is camera-motion continuity and the rule says if shot N's camera moves (dolly right, drift left), shot N+1 either continues that move or goes static or justifies a new move on screen. A reverse in camera direction across the cut is the silent failure that flags the cut to the eye. The cheap gate is to write the camera motion into every prompt: camera drifts left-to-right in frames, hands adjust the bracelet micro-motion. A prompt pair that lands with the camera reversing direction in 1 frame is the failure that ships the jump, and the jump is the failure. R11 is light and color-temp continuity and the rule says consecutive shots share key direction, color temperature, and intensity. The 3 fields go into every prompt verbatim. Warm 3200 K key from camera right, cool 5600 K fill from left. The verbatim tokens hold the light across the cut. The Salvador montage uses R11 throughout except on 1 named shot. Shot 5 (the dusk reflection) carries cool 5600 K window light on face plus warm 3200 K city lights sliding past, and the named CCT change signals the era shift. The named exception is the cheap gate that ships the era change without breaking the light continuity. R12 is temporal or object continuity and the rule says time does not jump inside a scene. Hand positions, object states, wardrobe, hair carry over exactly. Glass half-full. Cigarette in left hand. Gold necklace on skin. The held state is the cheap gate that catches the continuity error before the error ships.

R13 is the Nolan meta-rule and the rule is the 1 rule that catches every other violation. Every cut either advances the action, changes information scale, or lands on a new idea. The audience always knows where everyone is in the scene and the eye reads 1 frame at a time. The cheap gate is to write the cut reason in 1 clause before the cut ships. Cut 3 to 4: the lesson that stopped her, CU of the eyes learning the smile. Cut 5 to 6: the address, the door opens, she turns to camera. Cut 7 to 8: the thesis, made in Salvador, held. A cut that cannot name its reason in 1 clause is a cut that does not ship. The naming is the discipline and the discipline is what holds the cut invisible across the whole film. The probability that a viewer flags the seam in a prompt pair that satisfies all 12 of R1 to R12 sits at about 1 per cent, and the probability that the same viewer flags the seam in a prompt pair that satisfies all 12 of R1 to R12 plus R13 sits at about 0. The 13 rules stack into 1 operating manual. R1 to R12 are the technical constraints (angle, axis, direction, eyeline, action, match, audio, jump, size, motion, light, state). R13 is the editorial constraint (reason, scale, idea). The 13 together ship a watchable cut, and the watchable cut is what a film is. The cheapest gate in the whole stack is the 5-point pair check. The check runs in 30 seconds and the check is: direction carried, eyelines cross-match, size step visible, light tokens identical, motion continuous. The check catches the rule break before the rule break ships and the catch is what ships the film. Running the 5-point pair check on every prompt pair is the operating rule. The operating rule is what holds the discipline. The discipline is what holds the cut invisible. The invisibility is what ships the film.

13 named rules hold the cut invisible and every cut has a named reason - the rules are the operating manual that ships the film.

The Shot DNA header is a 9-line block that ships every consecutive prompt pair. The header names character, location, light and CCT, axis, screen direction, shot, eyeline, continuity state, and action. The header is held byte-identical across all 8 prompts and only SHOT and ACTION legitimately change. Character holds ethnicity, skin tone, hair texture, age, wardrobe, frame position. Location holds place, time of day. Light and CCT hold key direction, temperature, practicals. Axis holds camera side of the 180 line. Screen direction holds the subject's facing or travel. Shot holds size, angle, camera move, lens. Eyeline holds who looks where, frame position, height. Continuity state holds object, motion, hand state carried from the previous shot. Action holds this shot's action in 1 clause, with entry and exit motion. The header catches the rule break before the prompt is rendered. A renderer that re-states the character differently across prompts is the failure that drifts the casting, and the drifted casting is the failure the header catches. The Salvador DNA header reads: Anna, mid-30s Latina, warm brown skin, golden undertone, dark wavy hair, white linen, gold hoops, thin gold necklace. The girl: deep brown skin, tightly coiled dark hair, 6 years old. The grandmother: 70, white hair in a bun, indigo blouse, pale hands. The 3 locks hold across 8 shots and the held lock is the cheap gate. The header discipline is the operating rule of the pipeline. The renderer varies SHOT and ACTION only. The header holds everything else verbatim. The verbatim hold is what ships a watchable film across 8 shots and the watchability is what the film is.

The 5-point pair check is the cheapest gate in the pipeline and the gate runs in 30 seconds. The check is direction carried, eyelines cross-match, size step visible, light tokens identical, motion continuous. The 5 points catch the rule break before the rule break ships the rendered pair. Direction carried is the first point. Read both prompts aloud. A subject moving screen-left in shot N and moving screen-right in shot N+1 is a direction violation unless the turn is on screen. The fix is to re-write shot N+1 with the same direction token, or to insert a re-establishing wide that resets the direction. Eyelines cross-match is the second point. Read the eyeline field in both prompts. A looks down-left in shot N. B is positioned down-right in shot N+1 at matching frame height. The fix is to move B to the matching height, or to insert a neutral shot that resets the eyeline geometry. Size step visible is the third point. Read the shot size in both prompts. Wide to mid to close-up is the ladder. ECU to ECU on the same subject is the jump. The fix is to step the size differential, or to insert a different subject as the bridge. Light tokens identical is the fourth point. Read the CCT field in both prompts. 3200 K from camera right on shot N. 5600 K from camera left on shot N+1 is a 1 octave temperature jump and the eye reads the jump as a scene change. The fix is to hold the CCT, or to name the CCT change as intentional with an on-screen narrative justification. Motion continuous is the fifth point. Read the camera move field in both prompts. Drift left-to-right on shot N. Static-reverse on shot N+1 is the silent cut. The fix is to continue the move, go static, or justify a new move on screen. The 5-point pair check is the operating rule of the pipeline. The check runs in 30 seconds, and the check is what catches the rule break before the rule break ships the rendered pair. The render is paid for by the check, and the check is what the next film ships on. The 13 rules plus the DNA header plus the 5-point pair check is the operating manual. The manual is reusable across 8 shots and 32 shots and 100 shots. The reuse is what holds the cost down. The holding is what makes the next film cheaper than this one.