KK_AnisotropicMorph

A BepInEx plugin for Koikatsu that adds anisotropic physics simulation to breast and butt bones, providing more realistic and configurable jiggle behavior than the game's built-in Dynamic Bones.

Requirements

• KK / Koikatu / Koikatsu Party
  OR
• KKS / Koikatsu Sunshine
• BepInEx 5.x
• ABMX (KKABMX)

Installation

Drop KK_AnisotropicMorph.dll into BepInEx/plugins/.

Configuration

Settings are accessible via the BepInEx Configuration Manager (F1).

General

Setting	Description
Enable	Apply physics to Male, Female, or both
MaleEnableDB	Force-enable Dynamic Bones on male characters (normally disabled by the game)
FilterFPS	Smooth out framerate spikes to avoid physics glitches at low FPS

Breast / Butt

Both body parts share the same set of parameters.

Effects — choose which physics effects are active:

• Linear — spring-based position offset
• Angular — rotational tilt
• Tethering — oscillation/bounce effect
• Acceleration / Deceleration — velocity-based scale squash & stretch
• GravityLinear — directional gravity offset
• GravityAngular — directional gravity tilt
• GravityScale — gravity-driven scale response

AdjustForSize — scale physics response proportionally to the character's body size.

DisableClothed — automatically disable physics when specific clothing slots are occupied (Top, Bot, Bra, Panty, Gloves, Pantyhose, Socks, ShoesIn, ShoesOut).

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Linear parameters

Setting	Description
LinearStrength	Spring force pulling bone back to rest position
LinearDamping	Resistance to movement (higher = less oscillation)
LinearGravity	Constant downward force
LinearLimitPositive/Negative	Max displacement per axis (X/Y/Z)

Angular parameters

Setting	Description
AngularStrength	Rotational spring force
AngularDamping	Resistance to rotation
AngularMaxAngle	Maximum rotation angle
AngularApplyToRoot	Apply rotation to root bone (axes)
AngularApplyToBone	Apply rotation to child bone (axes)

Scale parameters

Setting	Description
ScaleAccelerationFactor	Squash amount when bone accelerates
ScaleDecelerationFactor	Stretch amount when bone decelerates
ScaleLerpSpeed	How quickly scale returns to normal
ScaleMaxDistortion	Maximum scale change
ScaleUnevenDistribution	Per-axis scale weight (X/Y/Z)
ScalePreserveVolume	Compensate scale on other axes to preserve volume
ScaleDumbAcceleration	Simplified acceleration calculation

Tethering parameters (requires Tethering effect enabled)

Setting	Description
TetheringMultiplier	Oscillation strength (negative = inward pull)
TetheringFrequency	Oscillation speed
TetheringDamping	Oscillation decay rate
TetheringMaxAngle	Maximum tether angle