During GDC 2026, NVIDIA held a presentation on path tracing and took the opportunity to detail RTX Mega Geometry, a new system focused on rendering foliage. More importantly, they revealed a highly anticipated upcoming title that will utilize this technology: The Witcher 4.
A few weeks after the event, NVIDIA finally shared the full video of the presentation, revealing just how ambitious CD Projekt Red’s next project truly is.
Toss a Coin to Your Millions of Polygons
By taking a deep dive into the hour-long video presentation, you can notice that there is a tech demo provided by CD Projekt Red hidden in plain sight, which showcases three tree assets that are seemingly pulled straight from The Witcher 4.
According to NVIDIA, the demonstration was built around some pretty impressive numbers: a massive outdoor scene featuring roughly 60 million plants, approximately 1 million trees, and over 200 different plant species across a 5×5 km map.
They go on to explain that with RTX Mega Geometry, the foliage is modeled as geometry down to the level of individual pine needles, with no alpha cards used in the base assets. And some of the larger trees even exceed 10...
