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Setting Up ましゅまろPB

ましゅまろPB (by wataame89) is a VRChat breast physics system featuring squishing, bouncing, gravity, and player-to-player interaction. 3+1 is a supported avatar for Additional Preset ① (paid).

Download: BOOTH
Official documentation: wataame89.github.io

Installation​

  1. Add Modular Avatar to your project via VCC
  2. Import the ましゅまろPB main package and Additional Preset ①
  3. In the Hierarchy, right-click the avatar → select wataameya → MarshmallowPB
  4. Select さんぷらすうの 3+1 from the preset list — the breast bones (Breast.L / Breast.R) are configured automatically
Basic settings
  1. Adjust the settings on the generated marshmallow_PB_Setup object to the values below

When you select さんぷらすうの 3+1 as the preset, the physics parameters for PB are set almost automatically. The only two items that need manual adjustment are PB Preset and Collider.

PB Settings (PhysBone Setting)​

PB settings

Choose PB Preset according to your preference. たゆんたゆん（やわらかめ）Bouncy (Soft) is the creator's recommendation.

Assign the following 6 objects to Collider in order. Leave Elements 6–9 as None.

SlotObject
Element 0L_Col_LowerArm
Element 1L_Col_UpperArm
Element 2R_Col_UpperArm
Element 3R_Col_LowerArm
Element 4L_Col_UpperLeg
Element 5R_Col_UpperLeg

Squish / Collision Settings, Penetration Prevention Settings, and Menu Settings​

Squish, penetration prevention, and menu settings

Enable all checkboxes except Disable Squish. Confirm that the Menu Install Target is set to 3+1 PreferenceMenu.

Disabling 3+1's Built-in Breast Squish System​

3+1 includes breast squish layers SYS_SCALE_L / SYS_SCALE_R in the FX controller by default. Because these overlap with ましゅまろPB's squish feature, they should be disabled or deleted.

FX controller SYS_SCALE layers
  1. Open 3+1's FX controller in the Project window
  2. In the Animator window, locate the SYS_SCALE_L and SYS_SCALE_R layers
  3. Set each layer's Weight to 0, or delete the layers
Setting the weight to 0 allows you to revert the change later. If you choose to delete the layers, make a backup of the controller first.

Verification​

After setup, use Gesture Manager Emulator (Tools → Gesture Manager Emulator) to confirm the following:

  • Breasts bounce
  • Pressing the breasts causes squishing
  • The left and right breasts interact with each other
  • There is no double squish from SYS_SCALE_L / SYS_SCALE_R