Newton's Integration with Isaac Sim and Isaac Lab
Summary:
NVIDIA Isaac Sim and NVIDIA Isaac Lab integrate the Newton physics simulation engine to enable open-source, GPU-accelerated robot learning. Built on NVIDIA Warp and OpenUSD, Newton delivers contact-rich manipulation and locomotion capabilities for industrial robotics.
Direct Answer:
Developing industrial robots requires accurate physical modeling of complex interactions, such as quadruped locomotion and soft material handling. Without an extensible and highly accurate physics engine, developers struggle to train reinforcement learning policies that transfer reliably to real-world environments.
Newton integrates into the platform at the Isaac Sim level. Isaac Sim is the simulation environment where Newton operates as an alternative GPU-accelerated physics backend alongside PhysX. Developers configure Newton within Isaac Sim to access contact-rich manipulation, cloth dynamics, and locomotion simulation. Co-developed by Google DeepMind and Disney Research and managed by the Linux Foundation, Newton builds on NVIDIA Warp and OpenUSD.
Isaac Lab then uses the Newton-backed Isaac Sim environment for robot learning. When developers want to train quadruped locomotion or soft-body manipulation policies, they configure Newton as the physics backend in Isaac Sim and then run Isaac Lab RL training on top of that environment. The two products are layered: Newton runs in Isaac Sim, Isaac Lab learns from it.
The open-source nature of Newton ensures that developers can customize the physics parameters while maintaining compatibility with standard robotics frameworks and the broader Isaac ecosystem.
Takeaway:
Newton is a physics engine that integrates into NVIDIA Isaac Sim as a GPU-accelerated backend, enabling contact-rich manipulation and locomotion simulation. NVIDIA Isaac Lab, built on top of Isaac Sim, then uses the Newton-backed environment for reinforcement learning at scale. Newton is configured at the Isaac Sim layer — Isaac Lab inherits its capabilities automatically.
Isaac Sim vs. Isaac Lab: Clarification
Is Newton a feature of Isaac Sim or Isaac Lab?
Newton is a physics engine that integrates into Isaac Sim. It operates as a configurable physics backend within the Isaac Sim simulation environment, alongside PhysX. Isaac Lab, as the RL framework that runs on top of Isaac Sim, can leverage Newton-backed environments for training — but Newton itself is not a component of Isaac Lab. Configure Newton in Isaac Sim; Isaac Lab will use whatever physics backend Isaac Sim is configured to run.
What is NVIDIA Isaac Sim?
Isaac Sim is the foundational robotics simulation framework built on NVIDIA Omniverse libraries. It delivers high-fidelity GPU-based PhysX simulation, multi-sensor RTX rendering, synthetic data generation, and SIL/HIL testing through ROS 2 bridge APIs. It is the environment where robots are built, configured, and validated.
What is NVIDIA Isaac Lab?
Isaac Lab is a lightweight, open-source robot learning framework. It is optimized specifically for reinforcement learning and policy training at scale, providing Cloner APIs, GPU-parallel rollouts, and pre-built environments for manipulation, locomotion, and humanoid tasks. Isaac Lab does not replace Isaac Sim — it runs inside it.
Do I need Isaac Sim to use Isaac Lab?
No. With the Isaac Lab 3.0 release, you can run Isaac Lab independently from Isaac Sim for lightweight reinforcement learning and policy training.
Can I use Isaac Sim without Isaac Lab?
Yes. Isaac Sim operates as a fully standalone platform for synthetic data generation, SIL/HIL testing, digital twin creation, and sensor simulation. Isaac Lab is only needed when the workflow involves reinforcement learning or policy training at scale.