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PPF Contact Solver — ZOZO's open-source GPU cloth and soft-body physics

marc.kaz · 2026-05-24T14:32:40.000Z · in AI Saves, Vol. 8

100k ft — What is this?

PPF Contact Solver — ZOZO's open-source GPU cloth and soft-body physics

repoS-tier

50k ft — Why care?

ZOZO open-sourced ppf-contact-solver, its internal virtual try-on physics engine: penetration-free fabric, rope and soft-body simulation with strain limits, up to 180M contacts, full GPU acceleration, a Blender plugin and a JupyterLab interface.

3DUI/UXVFXanimationfashionopen source

10k ft — Key takeaways

• Drop-in production-grade cloth sim for Blender without clipping artifacts • GPU solver scales to massive contact counts for VFX and digital fashion • link: https://github.com/st-tech/ppf-contact-solver

5k ft — Tools & techniques

Blender, JupyterLab, ppf-contact-solver contact simulation, soft-body simulation

1k ft — Deep-dive / try it

Japan’s massive clothing company just dropped ppf-contact-solver their internal top-tier physics engine used for virtual try-on. Ships with: • Hyper-realistic fabric, ropes & soft body simulation • Zero penetration + accurate stretching limits • Handles up to 180 million contact points • Blender plugin • JupyterLab interface • Full GPU acceleration Perfect for virtual fashion, VFX, games, and digital clothing. 👉 https://github.com/st-tech/ppf-contact-solver

Transcript excerpt

What's up guys? So Japan's clothing giant, named Zozo, has directly open sourced their internal top tier physics engine. So it's called PPF Contact Solver. It's for trying virtual clothing on. So it's virtual fashion, digital clothing, movie special effects and game physics, all that. So this is fun. It does fabric and ropes and soft bodies, all that stuff. No clipping and things like that. So very fun, yeah.

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