Record the crop and scaling transform when isolating a character for a motion pass. Returning a processed crop to the original frame requires the corresponding position and size mapping, not merely dragging it until the face looks aligned. Keep the full-frame base, crop coordinates, output dimensions and timing together. Review more than one pose before approving the reintegrated character.
Preserve the crop specification
Write the crop rectangle relative to the source frame, along with any padding or resizing performed before generation. Note whether the model changed the output aspect ratio or dimensions. A nominally identical orientation does not establish identical coordinates or scale.
Runway’s multi-character tutorial includes isolation and later alignment in an external editor. That production step remains necessary even when a cropped character pass generates successfully. Its dialogue example does not validate exact dance reproduction.
Reinsert a diagnostic frame first
- Retain the untouched full-frame source as the coordinate reference.
- Record crop position, size, padding and output dimensions.
- Place the processed crop using the documented transform.
- Compare face, shoulder and foot anchors on a clear frame.
- Inspect a later extended pose and the full motion interval.
Aligning only a face can leave the body disproportionately large if the output changed its internal composition. If several anchors cannot align without non-uniform stretching, diagnose whether the model altered proportions or framing. Do not distort the character to hide that change.
Separate spatial and temporal registration
A correctly positioned crop can still use the wrong frame. Check the pass’s start time and any lead-in frame before adjusting its position. If one foot aligns at the start but appears shifted later, first compare the source and output at the same motion event.
Can I use the crop’s aspect ratio to recover its original location?
No. Aspect ratio describes shape, not where the crop came from. Retain coordinates and transformations at the moment you create the crop.
What if the replacement has a different hairstyle or silhouette?
Match stable anatomical anchors and review the intentional new silhouette separately. Extra hair or clothing should not force a larger face. Keep the approved identity design and the spatial mapping as two distinct review items.
Sources and scope
This is an original Imagild Editorial workflow guide, assisted by AI and reviewed against the linked sources on October 12, 2026. External tool procedures do not imply that Imagild provides those tools or guarantees their results.