Physics Sim

Community

arjun988

physics-sim

Rigid body, soft body, and destruction setups in Blender including constraints, cell fracture debris, and baked caches via MCP.

Overview

Publisher	arjun988
Repository	`blender-skills`
Skill name	`physics-sim`
Stars	384
Forks	22
Bundled files	3
License	MIT
Links	Skill source Repository Homepage

Markdown instructions
A SKILL.md file the model loads on demand, so it only costs tokens when a request actually matches.
Works with any LLM
AI skills are plain Markdown, not provider-specific code, so this works with GPT, Claude, Gemini, Grok, or a local model.
3 bundled files
Scripts, templates, and references the model can read while it works. Files are read-only and never executed.
Open source
Published by arjun988 on GitHub. Read the source before you install it.

Installation

Install the Physics Sim AI skill in TypingMind to use it with any LLM, or drop it into another agent that reads SKILL.md.

Install in TypingMind

TypingMind installs a skill straight from its GitHub folder — it reads SKILL.md, bundles the resource files, and stores the result locally.

Open the app and go to Plugins → Skills.
Choose "Install from GitHub".
Paste the skill folder URL below and confirm.
https://github.com/arjun988/blender-skills/tree/main/.claude/skills/physics-sim
Enable the skill in any chat where you want it available.

Plugins → Skills → Add skill → From GitHub URL, then paste the folder URL and press Continue.

Install in another agent

Any agent that reads the Agent Skills format can use this skill — copy the folder into that agent's skills directory.

Claude Code — .claude/skills

git clone --depth 1 https://github.com/arjun988/blender-skills.git /tmp/blender-skills
mkdir -p .claude/skills
cp -r /tmp/blender-skills/.claude/skills/physics-sim .claude/skills/physics-sim

Restart Claude Code after copying so it picks up the new skill.

Use it in TypingMind

Enable Physics Sim in any TypingMind chat and the model takes it from there. Its name and description sit in the system prompt, and the moment a request matches, the model loads the full instructions itself — you never invoke it by hand, and it costs no tokens until it is actually used.

The model loads Physics Sim on its own as soon as a request matches it.

Works with any AI model

AI skills are plain Markdown instructions rather than provider-specific code, so Physics Sim is not tied to the model it was written for. Install it once in TypingMind and use it with GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral, Llama, or a local model you run yourself — all on your own API keys.

Loaded only when it is needed
The system prompt carries just the name and description. The instructions are fetched on the first matching request, so an idle skill costs nothing.
Switch models mid-chat
Because the skill is instructions rather than code, changing model does not break it — the next model reads the same SKILL.md.

Skill instructions

This is the SKILL.md content the model loads. Read it before installing — a skill is instructions your model will follow.

Physics Sim

Stable rigid/soft body setups. Motivated destruction. Baked caches.

When to Use

Rigid body interactions and collapses
Soft body jiggle / rubber / simple soft props
Destruction and debris (cell fracture / pre-cut shards)
Pre-vis physics before VFX polish

Workflow


Simplify collision meshes → Assign rigid/soft bodies
  → Constraints → Passive settings → Bake → Art-direct → Export cache

Rigid Body Quick Rules

Role	Settings notes
Active	Moving debris / props
Passive	Floors, walls, heavy anchors
Convex hull	Fast, approximate
Mesh	Accurate, heavier

Apply scale before sim
Use margin appropriate to scale
Collection: COL_Physics_[Shot]

Constraints

Hinge / fixed / motor for mechanical links
Breakable constraints for destruction beats
Name: RBCON_[Object]_[Type]

Destruction Approach


1. Pre-cut shards (cell fracture or manual)
2. Island meshes as active rigid bodies
3. Passive shell until trigger frame
4. Animate trigger (force / keyframed activation)
5. Bake → cleanup interpenetrations

Soft Body

Prefer for simple soft props; use cloth-sim for garments
Goal weights to retain shape
Soft + collision object required

Bake / Export

Bake to cache before render
Alembic/USD for cinematic debris
For games: bake key poses or flipbook; rarely live Blender physics

Constraints

MUST DO

Apply scale; use simplified colliders
Bake before final delivery
Trigger destruction intentionally (frame)

MUST NOT DO

High-res sculpt meshes as active colliders
Unbounded shard counts
Leave sims unbaked for final renders

Reference Guide

Topic	Reference	Load When
Rigid Body Presets	`references/rigid-body-presets.md`	When needed
Destruction Pipeline	`references/destruction-pipeline.md`	When needed
Sim Bake Checklist	`references/sim-bake-checklist.md`	When needed

Bundled files

The model reads these on demand while the skill is loaded. They are exposed as readable files and are never executed.

Frequently asked questions

What does the Physics Sim AI skill do?

Rigid body, soft body, and destruction setups in Blender including constraints, cell fracture debris, and baked caches via MCP.

Why use Physics Sim on TypingMind?

Because you install it once and use it with any model. Physics Sim is plain Markdown rather than provider-specific code, so the same skill runs on GPT-5, Claude, Gemini, Grok, or a local model — and you can switch model mid-chat without it breaking. TypingMind runs on your own API keys, so you pay providers directly instead of a per-seat subscription, and your skills and chats stay in your own storage.

How do I install Physics Sim in TypingMind?

Open Plugins → Skills → Install from GitHub in TypingMind and paste https://github.com/arjun988/blender-skills/tree/main/.claude/skills/physics-sim. TypingMind reads its SKILL.md and bundles its files and installs it as a skill you can enable per chat.

Which AI models can use Physics Sim?

Any model you connect in TypingMind. AI skills are plain Markdown instructions rather than provider-specific code, so GPT, Claude, Gemini, Grok, and local models can all load this skill when a request matches it.

How many AI models can I use with Physics Sim?

As many as you like. As long as a model supports skills, you can use Physics Sim with it — GPT, Claude, Gemini, Grok, DeepSeek, Mistral, Llama and more — all on TypingMind with your own API keys.

Is the Physics Sim AI skill free?

Yes. It is published on GitHub by arjun988 under the MIT license. You only pay your own AI provider for the tokens you use.

What are AI skills?

An AI skill is a reusable instruction bundle that teaches an AI model how to do one specific task. It follows the open Agent Skills format: a SKILL.md file with a name and description, plus any scripts, templates or reference files the model may need. The model reads the instructions only when your request matches the skill, so an installed skill costs nothing until it is used.

How are AI skills different from plugins or MCP servers?

A plugin or MCP server gives a model new tools to call — code that runs somewhere and returns a result. An AI skill gives the model knowledge and process instead: how to approach a task, which steps to follow, what good output looks like. Skills are plain Markdown, so they need no server, no API key and no runtime, and they work with any model.

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Overview

Installation

Install in TypingMind

Install in another agent

Use it in TypingMind

Works with any AI model

Skill instructions

Physics Sim

When to Use

Workflow

Rigid Body Quick Rules

Constraints

Destruction Approach

Soft Body

Bake / Export

Constraints

MUST DO

MUST NOT DO

Reference Guide

Bundled files

Frequently asked questions

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