NVIDIA's Zorah Scene Packs 1.6 Billion Triangles into 32 GB
Billions of Triangles Redux
NVIDIA's updated vk_lod_clusters sample features a 1.6-billion-triangle Zorah scene with full attributes and textures, compressed to 32 GB using meshoptimizer's glTF extensions. The author improved hierarchical clustered LOD support in meshoptimizer, achieving about 2x geometry compression and faster processing. The post details the compression pipeline, including the newer KHR_meshopt_compression extension, and runtime LOD selection via a BVH over the cluster DAG.
Instead of aiming for a maximum possible compression ratio, meshoptimizer codecs are designed for extremely fast decompression, and are flexible enough that the resulting size can be dialed further with layered compression.