Rendering animated hair on humans is about 2x faster with LSS compared to DOTS, while also requiring about 5x less VRAM to store the geometry. This is similar for other common use cases. With LSS on GeForce RTX 50 Series GPUs and DOTS for earlier GPUs, there is now a way to get the highest possible hair ray tracing performance on all RTX GPUs.
When ray tracing in CUDA, LSS is currently available in
OptiX. For DirectX, API for LSS can be found starting in the R570 version of the
NVAPI SDK. Vulkan developers will be interested in the LSS extension coming soon.