iRacing Physics Islands Explained
iRacing Physics Islands is a multithreaded refactor of the core physics loop that cuts CPU overhead by 50 percent in full-field races. Here is how it works and what it enables.
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iRacing Physics Update Season 3: Multi-Threading and What It Means for You
iRacing Season 3 brings a major physics engine update with multi-threaded processing, cutting CPU usage by half or more in full-grid sessions. Season 3 also redesigns pit speed enforcement for more consistent behavior on pit road.
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DX12 Update Adds Shadows, Nearing Release
The iRacing DX12 Graphics Engine is now nearing completion. In the August 2025 development blog, iRacing showcases new shadow rendering technology and improved environmental lighting, marking one of the final steps before public release. Developers describe the update as the most advanced visual system ever built for the sim. This latest progress focuses on finishing…
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DX12 Engine Shown Loading Cars and Tracks
First Look at iRacing’s DX12 Prototype The iRacing DX12 Engine is starting to take shape. In a behind-the-scenes developer update, iRacing shares early footage of its new DirectX 12 graphics engine successfully loading cars, tracks, and textures for the first time. This milestone confirms that the project has moved from concept to a functional testing…
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iRacing Working on New DX12 Graphics Engine
The iRacing DX12 Graphics Engine is now officially in development.In the May 2024 dev blog, iRacing confirms that its rendering team has begun building a new graphics engine powered by DirectX 12. The update promises better performance, modern lighting, and smoother frame rates across all hardware. This new system represents the biggest visual overhaul in…
