Live2D Parameters Reference

The Parameters tab is no longer just a slider list. In the current editor it handles four important jobs:

1. author the neutral pose used by preview and runtime recovery
2. configure Lip Sync Mapping
3. preview bundled Motions and Expressions
4. show or hide Parts

Neutral Pose / Authored Baseline

Use the parameter sliders to set the pose you want the model to return to when playback releases.

Common baseline parameters:

Parameter	Typical use
ParamAngleX / Y / Z	head pose
ParamEyeLOpen / ParamEyeROpen	eye openness
ParamMouthForm	default mouth shape
ParamBodyAngleX / Z	body lean
ParamBreath	default breathing amount

This authored baseline matters because:

• clip releases fade back toward it
• sequence testing starts from it
• timeline preview uses it as the Baseline mode

Search and Naming

The parameter panel supports:

• searching by localized name
• searching by raw Cubism ID
• working with models that expose many parameters

If a model uses unfamiliar IDs, rely on search plus live preview instead of trying to memorize the raw Cubism names.

Lip Sync Mapping

The current lip-sync tooling lives in the Parameters tab.

Target Modes

You can choose between:

• Use model defaults
• Use one custom parameter
• Use advanced custom targets

Advanced custom targets are useful when one model needs multiple mouth-related parameters with different weights or roles.

Validation Tools

You can validate lip sync with:

• live microphone input
• uploaded audio playback
• recorded test audio

Get lip sync stable before you author speaking loops. Otherwise you end up compensating in clips for a mouth target problem that should have been fixed here.

Motions

The Motions section previews bundled .motion3.json assets from the model package.

Use it to:

• preview model-authored motion clips
• stop a currently playing motion
• pin one motion as the legacy idle source

That pinned idle motion can optionally be allowed into the idle base runtime path from the Rules tab.

Expressions

The Expressions section previews bundled .exp3.json presets.

Use it to:

• inspect the model’s built-in looks
• quickly understand which parameters a preset affects
• decide whether to import that preset as an editable clip from the Clips tab

Expressions are useful both as a preview tool and as a source for imported clips.

Parts

The Parts section controls model drawable visibility.

Use it for:

• outfit switching
• accessory toggles
• hiding overlapping art layers
• checking whether a visual issue is really a parameter problem or a part-visibility problem

Part visibility is an authored state choice. If you need it to change over time, animate that behavior in clips rather than manually toggling it for runtime.

Common Parameters

Parameter	Description	Typical range
ParamAngleX	head turn left / right	-30 ~ 30
ParamAngleY	head up / down	-30 ~ 30
ParamAngleZ	head tilt	-30 ~ 30
ParamEyeLOpen / ParamEyeROpen	eye open amount	0 ~ 1
ParamEyeBallX / ParamEyeBallY	pupil direction	-1 ~ 1
ParamBrowLY / ParamBrowRY	eyebrow height	-1 ~ 1
ParamMouthOpenY	mouth open amount	0 ~ 1
ParamMouthForm	mouth shape	-1 ~ 1
ParamBodyAngleX	body sway	-10 ~ 10
ParamBreath	breathing driver	0 ~ 1

Tip

Not every model exposes every parameter. The editor only shows what the loaded model actually supports.

How This Tab Connects to Playback

The Parameters tab is part of the playback pipeline, not just setup UI.

• the authored baseline here is the preview/runtime fallback pose
• motions preview here can become the legacy idle source
• expressions preview here often turns into imported clips later
• lip sync here runs after the animation stack resolves

So if playback feels wrong, do not only inspect Rules and Clips. Check Parameters too.

Next Steps

• Animation & Mapping for clips, rules, base behaviors, and runtime arbitration
• Live2D Curve Editor for graph editing and release-curve work
• Live2D Getting Started for the full setup flow