Rigging Info Part 2 — Biped Settings & Mirroring

📺 Tutorial Video: Rigging Info Part 2 | Biped Settings & Mirroring Principles

Prerequisites for the Pose Reset & Mirror Pose functions in BipedPlus Ani Utils

⚠️ Prerequisite: To fully understand this document, first study the Local Matrix & Hierarchy concept.
→ 3dsMax Rigging Tutorial | Local Matrix & Hierarchy

2.1 Biped Settings Overview

Biped Settings is an option that saves Biped's basic information and mirroring rules into the Rigging Info node.

Tool	Usage
Fast-Ref	Rarely used
BipedPlus Ani Utils	Required — Used for Reset All / Mirror Pose functions

Biped Settings data must be saved for the Reset All and Mirror Pose functions in Ani Utils to work correctly.

2.2 Pose Reset

Restores controllers to their initial state based on the default pose stored in the Rigging Info node.

How to Save

Set the character to its default pose (A-Pose or T-Pose).
Execute [Save Update] in the Biped Settings section.
The default pose is saved to the node.

Usage

Ani Utils → Reset All restores to the saved default pose.
Instantly resets even when the pose is in a distorted state.

2.3 Mirroring Principles

BipedPlus controller mirroring works using the Local Pose Value × Pose Factor method.

Mirror Result = Source Controller's Local Pose Value × Pose Factor

Pose Factor Example

Axis	Factor Value	Meaning
X	+1	Same direction
Y	+1	Same direction
Z	-1	Inverted

Why is full automation difficult?
Every rigger and character TA has different conventions for which axis faces forward (X or Y) and how Z is oriented.
These differences make it extremely difficult to fully automate mirror scripts.
Manually setting the Pose Factor and Rotation Factor is currently the most stable approach.

2.4 BipedPlus Default Settings

Rigs built with BipedPlus have Pose Factor and Rotation Factor automatically set to default values.
No manual adjustment is needed — only modify in exceptional cases.

2.5 Mirror Exclusion

Specific controllers can be excluded from mirroring.

Example: Excluding an auxiliary sleeve controller from mirroring

Select the target controller.
Uncheck the mirroring option in Biped Settings.
Execute [Save Update].
That controller will be excluded from Mirror Pose operations going forward.

2.6 Center Controller Settings

Center controllers without left/right distinction (e.g., spine, head, COM) can also be configured to flip left-right during mirroring.

Designating a controller as a Center controller applies a left-right flip when Mirror Pose is executed.
Source and target can be specified by position even without naming conventions (_L / _R).

2.7 Settings Export / Import

The configured mirroring rules (Pose Factor, Rotation Factor, exclusion list) can be exported to or imported from a file.

Function	Description
Export	Save current settings to an external file
Import	Load and apply a saved settings file

Tip: If your project uses the same axis settings, share the exported file to apply identical settings across your entire team.

2.8 Save & Apply

After completing all settings, you must execute [Save Update] for changes to be reflected in the Rigging Info node.

Post-Save Checklist

If Reset and Mirror labels appear in the Ani Utils Status bar, the data has been saved successfully.
If the labels are absent, data has not been saved — execute Save Update again.