Optimizing meshoptimizer to process billions of triangles in minutes (2025)

NVIDIA’s RTX Mega Geometry release introduced a 100 GB Zorah demo that uses clustered ray tracing and a Nanite-style clustered LOD pipeline, later provided as a glTF file in the vk_lod_clusters sample. The author extended meshoptimizer to generate hierarchical DAG clusters of up to 128 triangles, ensuring visual error stays below one pixel while enabling streaming and rendering of billions of triangles in minutes.