The door is beside the character in one shot and on another wall in the next. Each clip looks plausible on its own, but the cut makes the room feel unfamiliar. A small set of shared landmarks can give you something concrete to check.
The Hell Grind production brief describes using fixed spatial descriptions to address position and camera-axis problems. This guide uses an original bookshop exercise to explain the approach. The example prompt has not been generated.
Describe the room before the action
Begin with three recognizable objects: a glass door, a counter and a floor lamp. Keep the room description separate from dialogue and movement.
Seen from the street entrance, the counter is at the far end of the room. A window runs along the right-hand wall. A floor lamp stands at the window end of the counter. The main light comes through that window.
Your room reference should support these relationships. A description that puts the door at the front and an image that puts it on the side are conflicting instructions.
Add positions for this shot
In the opening shot, the reader stands outside the counter and the bookseller behind it. The camera is on the reader’s side. When you cut to the bookseller, specify that the camera remains outside the counter and looks toward them.
Give “left” a point of view. A character’s left is not always frame-left. You can describe the current frame using its left and right edges, then check those directions against the fixed room landmarks.
After a legitimate camera move, objects may change sides in the image. Do not force every frame to have identical left-right placement if that would require the room to twist.
Decide how to cover the conversation
For a simple exchange, imagine the line joining the two speakers. Keeping routine coverage on one side of that line makes it easier to check their screen direction and eyelines.
Crossing the line can be a deliberate choice. If the story needs a new camera side, establish the change in a shot the viewer can follow. The useful question is whether the audience understands the space.
Write the room and the shot separately
Location: a bookshop at night. The glass door is at the entrance and the counter is at the far end. From the entrance, the window runs along the right-hand wall. The floor lamp stands beside the window end of the counter. Use the selected location reference.
Positions: the adult reader stands outside the counter. The adult bookseller stands behind it. They face each other across the counter.
Shot: look over the reader’s right shoulder toward the bookseller. The bookseller’s eyes meet the reader’s face. The camera remains outside the counter. The bookseller places a book in the middle of the counter; once it rests, the reader’s right hand enters from below and touches the cover.
Keep the book’s contact with the counter continuous. Preserve the window-light direction.
Separating the blocks lets you change the current action without accidentally rewriting the room.
Check the start, the contact and the end
At the start, identify where each person stands and what they hold. During the most complex action, check hands, contact points and the path of the object. At the end, record the state the next shot must pick up.
For example: “The book lies flat at the center of the counter; the reader’s right hand rests on its lower-right corner.” That gives the next shot a testable starting point.
A book-cover close-up or a rain-window cutaway may help the edit, but the eventual positions still need to make sense. In JMovie, check the location reference and current blocking together rather than assuming that every generation inherits the previous shot’s full spatial context.