Keying a Spine Region Position? Identify the Bone First

An image is positioned in setup pose but does not change as intended during an animation. First identify a rectangular Region attachment versus its bone, and whether the goal concerns attachment placement or motion over time.

Use the contract for the actual attachment

The official Region guide says the attachment's transform cannot be keyed in animations; its bone can be keyed instead. This concerns a Region's direct transform, not every image-related animation property.

An image can move with bones, sequences have another mechanism, and mesh-vertex deformation concerns another object type. Check the actual attachment and editor version before borrowing another object's workflow.

Identify the writer of the desired change

1. Record the attachment, parent bone, active animation and intended property.
2. Separate image placement in setup pose from bone changes along the animation.
3. Inspect corresponding bone keys in a project copy and observe whether that property changes during playback.
4. Keep image, export revision and observation time fixed, recording both requirement and result.

If the bone already moves but the image is wrong, inspect hierarchy, the displayed attachment and other controls. Missing keys are not the only possible cause.

Keep image edits distinct from external animation editing

The transform, mirror and Warp checklist concerns image adjustment in the workbench. Correcting a silhouette or orientation does not add keys to an external Spine bone timeline.

Conversely, a timeline key does not recreate missing pixels. Classify source content, static placement and animated properties before choosing a repair.

Protect related motion

A bone may affect other parts or interact with constraints. Have the owner establish the scope before accepting required animations. Resetting the whole skeleton every frame is not a general way to animate one attachment. Programmatic pose writes also need separate consumer-side inspection.

Retain template, motion and export revision with Spine Workbench and its guide. The guide does not promise a complete external Spine timeline editor. No keyframe-project experiment was run for this article; its artwork illustrates poses only.