AMD FSR SDK
AMD FSR™ SDK v2.4 is the launchpad for our ML-based FSR "Redstone" rendering technologies, inc. AMD FSR Upscaling, Frame Generation, Ray Regeneration, and Radiance Caching.
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 Radeon™ RX 9000 Series graphics (RDNA™ 4 architecture), 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:
Supports:
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.
AMD FSR Ray Regeneration 1.2.1 example
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.
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]) |
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™ Ray Regeneration performance may vary depending on your target hardware and configuration.
| Target Render Resolution | Average [ms] |
|---|---|
| 960x540 | 0.99 |
| 1920x1080 | 3.74 |
| 2560x1440 | 7.15 |
| Target Render Resolution | Average [ms] |
|---|---|
| 960x540 | 0.81 |
| 1920x1080 | 3.08 |
| 2560x1440 | 6.01 |
| Target Render Resolution | Average [ms] |
|---|---|
| 960x540 | 0.71 |
| 1920x1080 | 2.57 |
| 2560x1440 | 5.27 |
| Target Render Resolution | Average [ms] |
|---|---|
| 960x540 | 0.13 |
| 1920x1080 | 0.36 |
| 2560x1440 | 0.57 |
Performance figures are accurate at the time of writing for an AMD Radeon™ RX 9070 XT and are subject to change.
Supported GPUs
Supported graphics APIs
Supported OS
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Added optional standalone ambient occlusion denoising.
Added optional standalone specular occlusion denoising.
Fixed querying GPU memory usage after context creation.
Querying GPU memory usage before context creation now includes shader visible descriptors.
Added FFX_DENOISER_DISPATCH_NON_ENCODED_ALBEDO flag alias for FFX_DENOISER_DISPATCH_NON_GAMMA_ALBEDO.
Deprecated FFX_DENOISER_DISPATCH_NON_GAMMA_ALBEDO.
API breaking additions:
None