High-fidelity reflections in your scene, without costing the earth. AMD FidelityFX Stochastic Screen Space Reflections (SSSR) uses your rendered frame to create brilliant reflections.
Download the latest version - v1.2
This release adds the following features:
- Extracted the essential parts of the library to one HLSL header file to ease integration.
- The reflection denoiser is extracted to its own library and added to AMD FidelityFX Denoiser.
- Fixed a few minor visual bugs.
- Both the DirectX®12 and Vulkan® sample have been reworked to utilize Cauldron and demonstrate the following effects:
Optimized for Shader Model 6.0+
Open source, MIT license
AMD FidelityFX SSSR provides an open source library to easily integrate stochastic screen space reflections into your game.
The term “Screen Space Reflections” describes an effect that can create realistic looking reflections purely based on information already present in the rendered image. The underlying algorithm shoots reflection rays from a depth imprint of the rendered scene (a so-called “depth buffer”) and follows them in constant steps through the image until these rays intersect with the depth buffer again. Instead of taking constant-sized steps, FidelityFX SSSR builds on an industry-leading algorithm that searches the rendered image in a hierarchical manner. This allows for larger and fewer steps on average, increasing performance of the search and quality of the final image.
To support glossy reflections, this FidelityFX effect jitters the reflection rays to create the sense of surfaces with varying roughness. However, that approach inherently introduces noise. Thus, AMD FidelityFX SSSR comes with a high quality denoiser specifically optimized for the RDNA™ architecture. The denoiser combines the results from multiple frames to create a noise-free image. Furthermore, it allows the ray count to decrease based on surface roughness, thus further speeding up screen space traversal.
- Hierarchical depth buffer traversal kernel.
- Confidence based hit validation.
- Support for Direct3D®12 API and Vulkan® API.
- Shaders written in HLSL utilizing SM 6.0 wave-level operations.
How it works
Reflection result processed by AMD FidelityFX Denoiser:
More AMD FidelityFX effects
AMD FidelityFX Parallel Sort makes sorting data on the GPU quicker, and easier. Use our SM6.0 compute shaders to get your data in order.
AMD FidelityFX Variable Shading drives Variable Rate Shading into your game.
AMD FidelityFX Denoiser is a denoising compute shader which removes artefacts from reflection rendering.
AMD FidelityFX LPM provides an open source library to easily integrate HDR and wide gamut tone and gamut mapping into your game.
AMD FidelityFX Combined Adaptive Compute Ambient Occlusion (CACAO) is an RDNA-optimized implementation of ambient occlusion.
FidelityFX Single Pass Downsampler (SPD) provides an RDNA-optimized solution for generating up to 12 MIP levels of a texture.
Radeon™ Cauldron is our open source experimentation framework for DirectX®12 and Vulkan®.
AMD FidelityFX Contrast Adaptive Sharpening (CAS) provides a mixed ability to sharpen and optionally scale an image.
Our other effects
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GeometryFX improves the rasterizer efficiency by culling triangles that do not contribute to the output in a pre-pass. This allows the full chip to be used to process geometry, and ensures that the rasterizer only processes triangles that are visible.
ShadowFX library provides a scalable GCN-optimized solution for deferred shadow filtering. It supports uniform and contact hardening shadow (CHS) kernels.
The TressFX library is AMD’s hair/fur rendering and simulation technology. TressFX is designed to use the GPU to simulate and render high-quality, realistic hair and fur.