[Blender] How to fix and materialize when the direction shifts in the mirror

2024-10-14 / Blender, Uncategorized
wp_tmb_blender-axis-mirror

Isn’t it common for the direction to shift when you “mirror” with a modifier?

Worries

When you mirror an object, the direction will shift…
The mirror doesn’t move in the direction I want.

Cause

[Transform] Rotation XYZ contains angle values.

This time, I will introduce how to fix and materialize when you cannot mirror properly due to misalignment of axis or direction in Blender.

Problem: The direction is shifted when mirroring.

I want to mirror the x-axis. The mirrors are out of alignment.
I want to mirror the X axis The direction shifts when mirroring

I can’t get the mirror to move in the direction I want.

How to fix mirror misalignment

Here is an example when mirroring on the X axis.

  1. Locate the object’s origin (pivot point).

Mirroring is done relative to the pivot point.

If you want to change the position of the pivot point, use “Edit Pivot” in Maxivz’s Interactive Tools for Blender. Move position.

  1. Check [Transform] → [Rotate XYZ].
Check the angle of the mirrored image.

Before applying rotation

  • Transform
    • Rotation
    • X 118°
    • Y 0°
    • Z 90°

With this rotation information, the image will shift in unpredictable directions when mirrored.

  1. [Object] → [Apply] → [Rotate].
Rotation, after application. x0, y0, z0

After applying rotation

  • Rotation
    • X 0°
    • Y 0°
    • Z 0°

[Apply] rotation will reset the rotation and make it easier to mirror.

  1. [Add Modifier] → [Mirror].
Add a modifier. mirror
  1. This time, when I mirrored it, it became symmetrical on the Z axis. (Automatically determined based on relative positional relationship)
Mirror Z-axis symmetry
  1. Check the X axis.
Check the x-axis.

The mirror is now complete.

Materialize the mirror object

object mirror materialization

As a side note, I will also introduce how to materialize (split) mirrored objects.

Materialization procedure

  1. Mirror “Apply”

The object will now materialize.

  1. [Edit Mode] Select an object.
  2. Separation: Select.

Now you can split the object.

Operating Environment

  • Windows 10 Pro 1909
  • Blender 2.83 Maya Config Addon For Blender 2.8
    • Maxivz’s Interactive Tools for Blender
  • Blender 2.90