Kawaii Physics Settings Multiplier

Not officially released

This feature has not been officially released yet. It is planned for KawaiiPhysics v1.22. Specifications may change during development.

Overview

In Sequencer, tune separate intervals for settled hair during dialogue or more movement during action. Changing base physics settings directly requires managing the values for each interval and restoring them at the end.

The settings multiplier track records scale and applied weight in Sequencer while keeping the base settings. It helps artists tune shots after establishing the character's normal motion.

Channels and Constraints

The track records Damping, Stiffness, WorldDampingLocation, WorldDampingRotation, Radius, LimitAngle, and Weight. It does not directly change the whole node Alpha. See Settings Multiplier for boundary conditions such as Radius and LimitAngle.

Tracks and Targets

Uses UMovieSceneKawaiiPhysicsSettingsMultiplierTrack and UMovieSceneKawaiiPhysicsSettingsMultiplierSection in the new KawaiiPhysicsSequencer module.

Track	Targets and conditions
Kawaii Physics Settings Multiplier	Bound SkeletalMeshComponent, or SkeletalMeshComponents contained in a bound Actor
Kawaii Physics Settings Multiplier (All)	Scans the playback Game/PIE/Editor world. Filter Tags required; empty disables it

Actor binding does not expand to the child-actor family. All scans reuse a 0.5 s cache, so spawn/destruction changes may not appear immediately.

Creating a Section

The following example changes Stiffness.

1. Open the Level Sequence with the target bound.
2. Add Kawaii Physics Settings Multiplier to that binding.
3. Set Stiffness scale to 0.5; leave the other scales at 1.
4. Set Weight to 1.
5. Play and compare before, during, and after the section.

A new section is one second long. Adjust its range to the intended interval in the Level Sequence.

Ending and Restoration

Scrubbing outside the section, stopping, or deleting releases the effect; BlendOutTimeOnEnd controls release at the end. Sections use Restore State and cannot use Keep State. Time-based scale evaluation does not guarantee physics rewind or reproducibility.

Stiff, Loose, and Freeze

The section Apply Preset menu offers Stiff, Loose, and Freeze for an initial comparison. Freeze is a preset name for high damping and Stiffness, not simulation stop.

Preset Values and Mutation Scope

Preset	Damping	Stiffness	Other four fields
Stiff	1.5	2.0	1
Loose	0.7	0.5	1
Freeze	10	10	1

Reset Scale to 1.0 and Apply Preset remove every key in all six Scale channels. Weight, Filter Tags, and the end fade remain unchanged. Freeze is not a stop API.

Section Labels

Labels show scales and tags. Live registry data adds (N nodes) or (no match). An empty All filter shows [Filter Tags required]. N counts queued requests, not physics evaluation completed on that frame.

Settings Multiplier · Animation Notifies

Related UE documentation

• Sequencer Editor — Review Level Sequences and timeline controls; the custom multiplier track is documented here. (UE 5.8)