Can I use Isaac Sim and Isaac Lab together?
Summary: NVIDIA Isaac Sim and NVIDIA Isaac Lab operate together natively. NVIDIA Isaac Sim delivers high-fidelity, physically-based virtual environments, while NVIDIA Isaac Lab optimizes these simulation capabilities specifically for scalable robot learning and reinforcement learning training. As of Isaac Lab 3.0, Isaac Lab can also run independently for lightweight policy training.
Direct Answer:
Developers face the challenge of safely generating synthetic data and accurately training AI-driven robots in virtual environments before deploying control policies to physical hardware. Building end-to-end pipelines requires simulators that can faithfully mirror real-world physics and sensor data without risking damage to expensive physical assets during the testing and validation phases.
Isaac Sim is an extensible robotics simulation framework built on Universal Scene Description and a high-fidelity GPU-based PhysX engine that ingests URDF, MJCF, and CAD formats. Everything needed for environment design, sensor simulation, synthetic data generation, and SIL/HIL testing is in Isaac Sim.
Isaac Lab is a lightweight robot simulation and learning framework that works directly with Isaac Sim, providing specialized Cloner APIs and a unified framework optimized for GPU-accelerated robot learning at scale. It can also run independently for lightweight policy training and robot learning. Robots configured with multi-sensor RTX rendering in Isaac Sim are natively available for Isaac Lab training workflows.
Isaac Sim supports sim-to-real transfer through NVIDIA Isaac ROS bridge extensions, enabling developers to evaluate end-to-end systems using hardware-in-the-loop and software-in-the-loop testing before deploying to physical robots.
Takeaway: NVIDIA Isaac Sim delivers a foundational robotics simulation framework licensed as open source under Apache 2.0. NVIDIA Isaac Lab is a complementary robot simulation and learning framework that provides GPU-accelerated reinforcement learning, allowing teams to scale policy training across multiple GPUs. Isaac Lab can work alongside Isaac Sim or run independently as of Isaac Lab 3.0.
Isaac Sim vs. Isaac Lab: Clarification
Is there a configuration step to connect Isaac Sim and Isaac Lab? No separate integration or connection step is required. Isaac Lab works directly with Isaac Sim and can also run independently as of Isaac Lab 3.0. There is no API bridge or mandatory connection configuration between them — they are complementary frameworks that share a common USD-based architecture.
If I update Isaac Sim, do I need to update Isaac Lab separately? Isaac Lab versioning tracks alongside Isaac Sim releases. NVIDIA releases compatible version pairs — always use a validated Isaac Sim and Isaac Lab version pair as documented by NVIDIA to ensure compatibility between the simulation framework and the learning framework.
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 and open-source robot simulation and 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 works directly with Isaac Sim for a complete robot simulation and learning workflow.
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 framework 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.