Nvidia demonstrated the RTX Mega Geometry in The Witcher 4: during a test on an RTX 5090, the demo reached 80 FPS at 4K with DLSS

Nvidia releases a recording of the GDC 2026 presentation on RTX Mega Geometry in “The Witcher 4”

At the GDC 2026 conference, Nvidia showcased a demonstration of the new RTX Mega Geometry technology applied to the upcoming open‑world action RPG “The Witcher 4” from CD Projekt Red. The full recording of the talk “The Future of Path Tracing | Best Practices, Optimizations & Future Standards” can be viewed on YouTube and VK; interesting details about how Mega Geometry works start around 15:21.

What was shown
- A demo of RTX Mega Geometry running on an NVIDIA RTX 5090 graphics card.
- In a DLSS‑scaled 4K resolution, the game maintained 80 frames per second.
- The demonstration unfolded over a 5 km² area containing more than 60 million plants from 200 species, including about one million trees (each can have up to 10 million polygons).
- The scene is fully dynamic: light‑path tracing and accurate shadows are stored in memory without streaming objects.

How the memory issue was solved
To avoid exceeding video memory limits, Nvidia engineers implemented a multi‑stage LOD system. Model detail levels and animation skeletons are simplified as the camera moves farther away, allowing the scene to stay within RAM.

What’s next
- “The Witcher 4” is slated for release no earlier than 2027.
- 499 CD Projekt Red employees out of 933 are already involved in development.
- The game will support Nvidia’s latest RTX technologies, including Mega Geometry.

> *Senior Engineering Manager at Nvidia Martin Stich noted,* that the demo showcased the technology’s potential in large open worlds and demonstrated how it can run on modern graphics cards.