Curve Focus — Documentation

Version 2.0+ · Blender 4.2+

Curve Focus helps you find, understand, and fix problem F-Curves in the Graph Editor — especially on dense character and mocap animation.

Installation

1. Download the .zip (do not unzip).
2. In Blender: Edit → Preferences → Get Extensions → Install from Disk
   (or Add-ons → Install on older layouts).
3. Enable Curve Focus.
4. Open a Graph Editor, press N, open the Curve Focus tab.

Also available as a small reminder panel in the 3D Viewport N-panel.

Requirements

• Blender 4.2 or newer
• Active object with an Action (animation data)
• For bone filters: armature in Pose Mode with bones selected when using “Only Selected Bones”

Quick start (2 minutes)

1. Select your armature (must be the active object).
2. Open the Graph Editor → N → Curve Focus.
3. Click Scan Animation.
4. Review the score and problem list.
5. Click a problem → read the explanation → Jump to Frame or Select Key.
6. Use Fix This or Fix Safe Problems, then scan again to see the new score.

Main features

Scan Animation

Scans every F-Curve on the active action and builds a health report:

• Score (0–100)
• Critical / Warning / Minor / Healthy counts
• Ranked problem list

The Graph Editor focuses on curves that need attention (severity ≥ warning).

Problem types

Each problem can show:

• Bone / channel name
• Frame
• Detail (e.g. jump angle, reversal count)
• Confidence (where relevant)
• What happened / Why it matters / Suggested fix

Jump to Frame / Select Key

• Jump to Frame — moves the playhead to the problem frame
• Select Key — selects the offending keyframe (and jumps to it)

Isolation tools

• Search — match bone, property, or axis (e.g. arm, spine rot)
• Body Part — All, Arms, Legs, Spine/Torso, Hands, Feet, Head
• Only Selected Bones — curves for selected pose bones
• Keyed on Current Frame
• Changed Recently — value change in a frame window
• Problems Only
• Sync to Selected Bones
• Isolate Only This Curve — single channel

Filters combine with AND (every enabled filter must pass).

Cleanup (visible curves only)

After cleanup, health stats refresh when a scan was already run. Run Scan Animation again anytime for a full report.

Recommended workflows

Mocap / Mixamo cleanup

1. Select armature → Scan Animation
2. Fix Safe Problems (once or twice)
3. Re-scan and check score
4. Manually inspect remaining criticals with Jump to Frame
5. Smooth or edit keys as needed

Finding one bad channel

1. Search or set Body Part → Isolate
2. Or Show Problems Only
3. Open a problem → Select Key → edit in the Graph Editor

Looping clips

1. Isolate the curves that must loop
2. Match Loop Ends (try First→Last or Average)
3. Check playback for a pop at the seam

Important notes

• Works on the active object’s Action only.
• Fix Euler Discontinuities does not modify quaternion curves — use Smooth instead.
• Diagnostics are heuristics: they highlight likely issues; they are not a full motion-analysis system.
• Intentional motion (e.g. rapid direction changes in a dance) can be flagged as jitter — use confidence and your eye.
• Prefer testing cleanup on a copy of the action if you need a safe backup.