The update targets geometry that does not fit in VRAM, allowing a scene’s source geometry to be streamed on demand. Nvidia states that when a scene goes over budget, it settles at lower detail instead of constantly swapping geometry in and out of VRAM. The default configuration allocates 2GB for streamed geometry, 2GB for ray-tracing acceleration structures, and 4GB for material textures, though these are adjustable. The technology builds on previous work, including the 0.9.0 beta released in 2025 and its integration into Alan Wake 2.

Nvidia demonstrated the technology with a sample called Zorah, which contains 1.6 billion unique triangles in a 70GB download. The sample requires up to 64GB of RAM at peak but only uses 1.5GB of mesh data in VRAM for the courtyard view on an RTX 5090 at 4K with DLSS Quality. The company notes that existing problems with Nanite elements switching to a single, static low-detail mesh under ray tracing have been addressed. These innovations are expected to later become part of Microsoft’s DirectX Raytracing 2.0 standard.

RTX Mega Geometry 2.0 is part of a larger RTX Kit 2026.3 update that includes RTX Character Rendering 1.4, RTX Dynamic Illumination 3.1, RTX Neural Texture Compression 0.10 beta, RTX Neural Shading 1.4, and RTX Texture Filtering 1.3. Nvidia has stated that Mega Geometry enables accurate ray tracing of Nanite geometry for the first time. The technology will debut in Gears of War: E-Day, which has an early access launch on October 1, with a Game Ready driver 617.14 already available.

For now, the SDK is a tool for developers, with no game confirmed to use the new version yet. The technology is designed to make dense scenes less expensive to ray trace, specifically addressing the challenge of building acceleration structures for Nanite geometry with existing DXR 1.2 and Vulkan APIs. Nvidia has taken six years to develop these innovations, which aim to provide a more efficient way to handle high-density meshes in real-time rendering.