PhysioBrush: Procedural Bone Physics & Jiggle Generator

Turn any bone-free model or with armature into a dynamic Skinned Mesh with physics in seconds! Just paint over the mesh in Unity, and Physio Brush auto-generates the bone chain, skin weights, and physics joints. Forget Blender and tedious manual rigging, adding life to hair, tails, or clothes has never been this fast and easy.

PhysioBrush - Professional Physics Painting Solution

PhysioBrush is a revolutionary tool for Unity developers that turns the tedious process of rigging hair, tails, and dynamic accessories into a fast, artistic workflow. Instead of manually placing bones and configuring joints, simply paint the desired physics areas directly on your mesh.

PhysioBrush analyzes your mesh volume and automatically generates a high-performance physical bone structure that integrates perfectly with your character.

Key Features:

Artist-Friendly Painting: Use the intuitive brush tool to define physics influence. No more fighting with vertex weight tables!

Instant Bone Generation: Automatically creates optimized bone chains with pre-configured joints and rigidbodies based on your painted weights.

Centroid Slicing Algorithm: Advanced volume analysis ensures bones are placed perfectly in the center of your mesh (ideal for thick tails and braids).

4 Specialized Physics Types:
Hair: Lightweight chains for strands and ponytails.
Tail: Heavy-momentum physics for smooth, organic tail movement.
Jiggle: Simple 2-bone spring physics for muscles and accessories.
Cloth (Bone-Based): A high-performance alternative to traditional cloth simulation, offering better stability and rig integration.

Auto-Collision Generator: Automatically generates limb and body colliders by analyzing your character's original rig weights.

Non-Destructive Workflow: Change parent bones, adjust curvature, or refine painting at any time without breaking your setup.

Technical Excellence:

Multi-Pipeline Support: Fully compatible with Built-in, URP, and HDRP.

SRP Agnostic: Custom shaders ensure consistent visual feedback across all render pipelines.

High Performance: Optimized bone-based engine that handles hundreds of dynamic strands with minimal CPU impact.

Prefab Friendly: Easily share settings across multiple characters or create unique variations using ScriptableObject-based presets.

Stability First: Built-in protection against mesh exploding, hierarchy desync, and jitter.

What is in the Box:

PhysioBrush Core Editor Window.
Physical Bone Engine and Runners.
Automatic Body Collision Generator.
Comprehensive Documentation and Quick Start Tutorial.
Sample character setup.