BH Smart Sym
BH Smart Sym is a lightweight add-on for Blender that lets you quickly symmetrize selected faces directly in Edit Mode. It displays interactive 3D arrows in the viewport, allowing you to choose the symmetry direction (X, Y, or Z) with a simple mouse click.
⚙️ How to Use
Switch to Edit Mode.
Select the faces or vertices you want to symmetrize.
To symmetrize the entire model, select all faces (A) and press Alt + X.
To symmetrize specific parts (for example, a bevel, detail, or edge), select only the needed faces.
Click on one of the 3D arrows to mirror along that axis.
The tool performs symmetry relative to the object’s origin and automatically respects object rotation.
Right-click or press Esc to exit the mode.
🌟 Features
Interactive 3D arrows that stay visible at a constant on-screen size.
Works relative to the object’s origin and respects rotation.
Perform symmetry on selected faces only — not necessarily the whole mesh.
Adjustable arrow size in add-on preferences.
Customizable hotkey (default = Alt + X).
Smooth, live viewport update — arrows follow the view and refresh automatically.
What's New
1.0.0 June 17th, 2026
- Fixed bugs
- Add Arrow customization
Thank you for the great add-on! It runs very smoothly. However, if I were to be greedy... it might be more intuitive if the selection direction of the gizmo was reversed. For example, with the current specifications, if you want to copy upwards, you have to select downwards in the gizmo. I think it would be easier to use if you could select in the direction you want to copy. I would appreciate your consideration.
I strongly disagree with previous comment, the logic is good as it is.