NRD is an open sourced, spatio-temporal ray tracing de-noising library that’s designed to provide high-quality real time imagery with as few as 0.5 or 1 rays per pixel. NRD uses input signals together with environmental conditions to deliver results comparable to ground truth images. NRD supports diffuse lighting, specular lighting or reflections, and infinite light source shadows. The NRD library is fast, robust, and easy to integrate with Vulkan applications using ray tracing.