Denoising

GTAO and RTAO share the same denoising pipeline with minor differences. This pipeline consists of two stages: Temporal and Spatial. Both stages aim to reduce noise.

The Temporal stage accumulates samples over multiple frames, reducing noise at the cost of responsiveness, but otherwise doesn't impact quality.

The Spatial stage operates on a single frame, so it doesn't introduce any temporal lag. However, it has a different tradeoff, as it blurs the image, potentially removing valid features along with the noise.