AMD FSR Ray Regeneration

ML-powered real-time denoising

ML-powered real-time denoising

AMD FSR™ Ray Regeneration is a standalone, machine learning-powered real-time denoiser that integrates with game engines, enabling high-quality visuals by denoising inputs from ray-traced workloads.

Requiring AMD RDNA™ 4 architecture graphics, it works best when combined with other AMD FSR “Redstone” technologies and transforms noisy outputs from ray tracing into a clean, coherent image.

AMD FSR Ray Regeneration delivers:

Superior results compared to analytical denoising using ML.
Decoupled denoising independent of upscaling.
Optimal results when paired with FSR Upscaling.

Supports:

DirectX® 12.
Windows® 11.

AMD FSR SDK

AMD FSR™ SDK v2.3 is the launchpad for our ML-based FSR "Redstone" rendering technologies, inc. AMD FSR Upscaling, Frame Generation, Ray Regeneration, and Radiance Caching.

Download the latest version - v1.2.0

Download AMD FSR SDK package Read AMD FSR Ray Regeneration docs View AMD FSR SDK on GitHub

This release adds the following features:

AMD FSR Ray Regeneration 1.2.0 “Redstone” release (as part of the AMD FSR SDK 2.3):

Added support for denoising ambient and specular occlusion signals.
Added support for checkerboard rendering.

Features

ML-powered denoising

Superior image quality

Decoupled denoising

Easy integration

ML-powered real-time denoising

Since the advent of hardware-accelerated ray tracing, real-time game and rendering engines have increasingly adopted ray tracing techniques. From realistic reflections to finely detailed shadows, ray tracing has significantly elevated visual fidelity in modern games. As GPU ray tracing capabilities continue to improve, developers are pushing the boundaries of global illumination (GI) and exploring real-time path tracing. However, raw ray-traced outputs are inherently noisy, making effective denoising essential for producing clean, high-quality images.

Denoising transforms noisy ray- or path-traced outputs into coherent, visually accurate images, often leveraging both spatial and temporal information. AMD FSR Ray Regeneration performs this task with a key advantage: it uses machine learning (ML) to dynamically determine optimal filter weights, delivering superior results compared to purely analytical methods.

JPG (3840x2160)

AMD FSR Ray Regeneration 1.2 example

Decoupled denoising

AMD FSR Ray Regeneration performs denoising independently of upscaling, making it a decoupled denoiser. In contrast, denoising and upscaling can also be combined into a single, joint operation. Both approaches are valid, but decoupling denoising into its own dispatch call simplifies adding additional rendered content afterward.

Signals

To maximize compatibility and efficiency when denoising your game’s specific workloads, AMD FSR Ray Regeneration provides multiple input/output signals:

Signal flags	Input/output signals:
FFX_DENOISER_SIGNAL_AMBIENT_OCCLUSION	Ambient occlusion (in [0, 1]/[0, 1])
FFX_DENOISER_SIGNAL_DIRECT_DIFFUSE	Direct diffuse
FFX_DENOISER_SIGNAL_DIRECT_SPECULAR	Direct specular
FFX_DENOISER_SIGNAL_DOMINANT_LIGHT_VISIBILITY	Dominant light visibility (in [0, FP16_MAX]/[0, 1])
FFX_DENOISER_SIGNAL_INDIRECT_DIFFUSE	Indirect diffuse
FFX_DENOISER_SIGNAL_INDIRECT_SPECULAR	Indirect specular
FFX_DENOISER_SIGNAL_SPECULAR_OCCLUSION	Specular occlusion (in [0, 1]/[0, 1])

Works with AMD FSR Upscaling and FSR Frame Generation

AMD FSR Ray Regeneration is designed to work seamlessly with AMD FSR Upscaling and AMD FSR Frame Generation. Additionally, the temporal anti-aliasing provided by FSR Upscaling adds an extra layer of smoothing when used alongside FSR Ray Regeneration.

AMD FSR Upscaling

AMD FSR™ Upscaling is our cutting-edge ML-based upscaler. It delivers significant image quality improvements with reduced ghosting, better particle preservation, and superior detail.

AMD FSR Frame Generation

AMD FSR™ Frame Generation uses state-of-the-art machine learning to generate high-quality intermediate frames, delivering ultra-smooth gameplay on AMD Radeon RX 9000 Series GPUs.

Performance

AMD FSR Ray Regeneration performance may vary depending on your target hardware and configuration.

Denoising direct diffuse, direct specular, indirect diffuse and indirect specular signals:

Target Render Resolution	Average [ms]
960x540	1.10
1920x1080	4.26
2560x1440	8.10

Denoising indirect diffuse and indirect specular signals:

Target Render Resolution	Average [ms]
960x540	0.87
1920x1080	3.37
2560x1440	6.52

Denoising indirect specular signal:

Target Render Resolution	Average [ms]
960x540	0.71
1920x1080	2.63
2560x1440	5.34

Performance figures are accurate at the time of writing for an AMD Radeon™ RX 9070 XT GPU and are subject to change.

Requirements

Supported GPUs

AMD Radeon™ RX 9000 Series graphics cards and above.

Supported graphics APIs

DirectX® 12 + Shader Model 6.6.

Supported OS

Windows® 11.

Footnotes and disclaimers

DirectX and Windows are trademarks of the Microsoft group of companies.

Version history

Added optional add-on ambient occlusion denoising.
Added optional add-on specular occlusion denoising.
Added support for checkerboard rendering.
Added FFX_API_CONFIGURE_DENOISER_KEY_DEBUG_VIEW_LINEAR_DEPTH_BOUNDS.
Added FFX_DENOISER_ENABLE_VALIDATION flag.
API breaking additions:
FfxApiDenoiserSignal::_reserved is removed.
ffxDispatchDescDenoiser::deltaTime is removed.
ffxQueryDescDenoiserGetVersion is removed:
- API version is DLL version.
- Provider version is embedded in provider version name.
Fuse mode API is removed:
- FfxApiDenoiserMode is removed.
- ffxCreateContextDescDenoiser::mode is removed.
- ffxDispatchDescDenoiserInput1Signal (incl. Fused Albedo) is removed.
- ffxDispatchDescDenoiserInput2Signals is removed.
- ffxDispatchDescDenoiserInput4Signals is removed.
- ffxQueryDescDenoiserGetGPUMemoryUsage::mode is removed.
Logging API is changed:
- ffxCreateContextDescDenoiser::fpMessage is replaced with ffxConfigureDescGlobalDebug.
Matrix API is added:
- ffxDispatchDescDenoiser::cameraRight, ffxDispatchDescDenoiser::cameraUp, ffxDispatchDescDenoiser::cameraForward, ffxDispatchDescDenoiser::cameraAspectRatio, ffxDispatchDescDenoiser::cameraNear, ffxDispatchDescDenoiser::cameraFar, and ffxDispatchDescDenoiser::cameraFovAngleVertical are replaced with ffxDispatchDescDenoiser::view and ffxDispatchDescDenoiser::projection.
- ffxDispatchDescDenoiser::linearDepth now contains the signed linear depth instead of absolute linear depth.
- ffxDispatchDescDenoiser::motionVectors::z now contains the signed linear depth delta instead of absolute linear depth delta.
- ffxDispatchDescDenoiser::motionVectorScale::z now contains the signed linear depth delta scaling factor instead of absolute linear depth delta scaling factor.
Passthrough API is added:
- ffxDispatchDescDenoiser::linearDepthBounds is added.
Reconstruction API is added:
- FfxApiDenoiserSignal::checkerboardOrigin is added.
- ffxCreateContextDescDenoiser::checkerboardSignalFlags is added.
- ffxQueryDescDenoiserGetGPUMemoryUsage::checkerboardSignalFlags is added.
Signal API is added:
- FFX_DENOISER_ENABLE_DOMINANT_LIGHT is replaced with FFX_DENOISER_SIGNAL_DOMINANT_LIGHT_VISIBILITY.
- FfxApiDenoiserSignalFlags is added.
- ffxCreateContextDescDenoiser::signalFlags is added.
- ffxDispatchDescDenoiserAmbientOcclusion is added.
- ffxDispatchDescDenoiserDirectDiffuse is added.
- ffxDispatchDescDenoiserDirectSpecular is added.
- ffxDispatchDescDenoiserIndirectDiffuse is added.
- ffxDispatchDescDenoiserIndirectSpecular is added.
- ffxDispatchDescDenoiserInputDominantLight is replaced with ffxDispatchDescDenoiserDominantLight.
- ffxDispatchDescDenoiserSpecularOcclusion is added.
- ffxQueryDescDenoiserGetGPUMemoryUsage::signalFlags is added.