Object Side Symmetrizer add-on

This add-on mirrors or deletes selected objects based on left/right markers in their object names. It is meant for separate mesh objects such as armor pieces, pads, accessories, or weapon parts where you want thing.L to create thing.R.

Download

blender_object_side_symmetrizer_addon.py

Recognized names

Side markers can be prefixes or suffixes. The delimiter can be a dot, underscore, or dash.

• scope.L mirrors to scope.R
• scope_left mirrors to scope_right
• left-scope mirrors to right-scope
• L.scope mirrors to R.scope

Install

1. In Blender, open Edit > Preferences > Add-ons.
2. Use Install from Disk and choose blender_object_side_symmetrizer_addon.py.
3. Enable Object Side Symmetrizer.

Use

1. Select the objects you want to operate on.
2. Open the 3D View sidebar with N.
3. Go to Object > Object Side Symmetrizer.
4. Choose Symmetrize Left To Right, Symmetrize Right To Left, Delete Lefts, or Delete Rights.
5. Run once with Dry Run enabled to check the console output.
6. Disable Dry Run and run again to apply the operation.

Mirror behavior

The add-on duplicates the source object, renames the duplicate to the opposite side, and mirrors it across the selected world axis. For most character and weapon assets, use the default X axis and keep the asset centered around world X = 0.

If a counterpart already exists, Overwrite Existing Counterparts replaces it. If that option is off, Blender creates a numbered duplicate name instead.

Notes

This is object-level symmetry, not edit-mode mesh symmetrize. It does not inspect mesh topology and it does not use bone naming conventions. It only uses the selected object names and their transforms.