by Penfantasi·Workflow
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Mocap Bone Lock stands out for its non-destructive approach: the original motion stays intact in the NLA and every lock is reversible. Recent updates added Blender 5.0 support and compatibility with AutoRigPro and similar rigs.
Mocap Bone Lock is a Blender add-on that locks bones over time, built to make motion-capture cleanup fast, predictable and editable. It targets foot and hand sliding after retargeting, and its non-destructive NLA workflow keeps the original motion preserved and every lock fully reversible without requiring deep NLA knowledge. It works on long mocap clips and scales to hundreds or thousands of frames.
The add-on offers two locking methods. Manual Mode lets you select bones, set a frame range and fade, adjust placement with a movable Empty, then bake. Auto Mode is foot-optimized and detects contact using an adjustable threshold, with two detection types: Dip Detect, the default, based on bone position on the Z axis and suited to flat surfaces, and Velocity Detect, an experimental option based on movement speed that can be applied to any bone. Both modes share Frame Lock Range and Fade In / Fade Out controls, and you can preview placement before baking.
Mocap Bone Lock is optimized for IK bones, while manual mode also works for hands and other bones. It's been tested on Blender 4.2, 4.5 and 5.0, and ships under the GPL license. Update 1.1 added compatibility with AutoRigPro and similar rigs.
Mocap Bone Lock is best for cleaning up foot and hand sliding in retargeted motion capture inside Blender.
Mocap Bone Lock is completely free to download and use.
Mocap Bone Lock lists Blender compatibility from 4.2 through 5.0 and has been tested on 4.2, 4.5 and 5.0. Blender 5.0 was released in November 2025, and a dedicated variant, 1.0.1, was confirmed working on it. For Blender 5.x there is also variant 1.1.1. If you're on Blender 5.0 or later, the developer recommends grabbing the latest version to avoid problems with leftover constraints and empties tied to the removal of legacy action f-curves.
Mocap Bone Lock is listed here as free, and it ships under the GPL license. Pricing and licensing terms can change, so check the developer's page for the current details before you download. The tool is distributed as a Blender add-on, with separate variants available for different Blender versions, so you can match the download to the version you run. Cycles and Eevee are listed as the render engines used.
Mocap Bone Lock uses a non-destructive NLA workflow, so the original motion is preserved and every lock is fully reversible, without requiring deep knowledge of Non-Linear Animation. You can preview placement before baking, adjust a bone using a movable Empty, then bake when the result looks right. Since update 1.1, baking keeps the original constraints intact and accounts for their effect on the motion, deleting only the constraints that Mocap Bone Lock itself created.
Mocap Bone Lock added compatibility with AutoRigPro and similar rigs in update 1.1, released March 3, 2026. That same update changed how baking behaves: it now keeps original constraints intact and tries to account for their effect on the motion, while removing only the constraints the add-on created. The tool is noted as optimized for IK bones, and manual mode works for hands and other bones as well.
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