Search

RTX Mega Geometry replaces the low-detail ray-trace (RT) mesh used for Nanite objects with a far more detailed RT base while keeping performance smooth, so ray-tracing can run stably in ultra-detailed scenes. Compared with using the low-detail RT meshes, this boosts RT performance and yields more accurate, higher-quality shadows, reflections, and lighting.

RTX Mega Geometry is a technology that lets ray tracing work efficiently with Unreal Engine 5's Nanite virtualized geometry by providing a far more detailed base mesh for RT than the low-detail meshes games otherwise use. In Gears of War: E-Day it replaces the low-detail RT proxy geometry with higher-detail geometry for ray tracing, which yields more accurate shadows, reflections, and lighting and improves the detail and quality of ray-traced reflections, adding realism and cinematic immersion.

Nanite creates extremely detailed environments, but for ray-traced effects the game uses a low-detail mesh because Nanite's sheer complexity makes ray tracing at stable frame rates virtually impossible. RTX Mega Geometry provides a far more detailed base for ray tracing without the performance hit, so shadows, reflections, and lighting become more accurate and cinematic while keeping ray-tracing performance smooth.

According to the article, RTX Mega Geometry most benefits ray-traced effects such as shadows, reflections, and lighting, making those more accurate and cinematic. It also lets ray tracing use the high-detail Nanite geometry (for example creases and rivets in clothing and small scene details like debris, pebbles) instead of a low-detail mesh, improving the detail and quality of ray-traced reflections.