AMD FidelityFX™ Hybrid Stochastic Reflections sample

AMD FidelityFX™ Hybrid Reflections background

Combine SSSR with ray tracing

The AMD FidelityFX™ Hybrid Reflections sample shows how to combine AMD FidelityFX™ Stochastic Screen Space Reflections (SSSR) with ray tracing in order to create high quality reflections.

Supports:

DirectX® 12
Vulkan®

Part of the AMD FidelityFX™ SDK

Download the latest version - v1.1.4

Download AMD FidelityFX™ SDK v1.1.4 package View AMD FidelityFX™ SDK on GitHub Read the AMD FidelityFX™ Hybrid Reflections sample info

This release of the AMD FidelityFX™ SDK adds the following features:

Additions to the API and fixes for issues discovered.

Features

Hybrid Reflections:
- Uses AMD FidelityFX™ SSSR to replace ray tracing intersection tests.
- Reshades re-projected pixels for accurate material evaluation.
- Supports lower resolution reflections using AMD FidelityFX™ Super Resolution (FSR) 1.0 upscaling.
- Uses per-pixel feedback to reduce hybridization cost.
Ray-traced reflections.
AMD FidelityFX™ reflection denoiser.

AMD FidelityFX™ Stochastic Screen Space Reflections (SSSR)

The AMD FidelityFX SSSR effect provides an open-source library to easily integrate stochastic screen space reflections into your game.

AMD FidelityFX™ Denoiser

AMD FidelityFX Denoiser is a set of denoising compute shaders which remove artefacts from reflection and shadow rendering.

Debug view

Left side: The hybrid stochastic reflections composited into the final scene.

Right side: Debug visualization which shows which pixels have their reflections calculated by ray tracing, screen space reflections, or a mix of the two.

Using hybrid stochastic reflections, decals which are rendered in screen space (and not present in the BVH) may be included in the reflections.

Screen space reflection

DXR ray

Screen space reflection, followed by DXR ray

No reflections

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AMD FidelityFX™ Hybrid Shadows sample

This sample demonstrates how to combine ray traced shadows and rasterized shadow maps together to achieve high quality and performance.

AMD FidelityFX™ Denoiser

AMD FidelityFX Denoiser is a set of denoising compute shaders which remove artefacts from reflection and shadow rendering.

AMD FidelityFX™ Stochastic Screen Space Reflections (SSSR)

The AMD FidelityFX SSSR effect provides an open-source library to easily integrate stochastic screen space reflections into your game.

Requirements

A graphics card with DirectX® 12 and DXR support.
Windows® 10 (64-bit recommended).
Visual Studio® 2019 with Visual C++® and the Windows® 10 SDK installed.

Version history

The AMD FidelityFX™ SDK 1.1.4 is a patch release that includes additions to API and fixes for issues discovered with AMD FSR 3.1.0 to 3.1.3.
Exposed 4 new tunings to reduce AMD FSR upscaler ghosting in newly disoccludded pixels or highly reactive pixels.
Changed the default value of fMinDisocclusionAccumulation to -0.333 (from equivalent of 0.333 in AMD FSR 3.1.3) to reduce disocclusion ghosting.
Added ffxQueryGetProviderVersion to get version info from created ffx-api context.
Exposed ffxDispatchDescFrameGenerationPrepareCameraInfo as a linked struct. It is a required input to AMD FSR 3.1.4 and onwards for best quality.
Added frame generation debug checker support.
Dropped unused interpolation command lists if frame generation callback fails, to fix infinite wait at swapchain destruction.
General fixes to Vulkan® Frame Interpolation Swapchain.
General framework fixes and updates.
Frame pacing debug line added to Vulkan®.
Added new FFX error when create frame interpolation swapchain results in E_ACCESSDENIED in DX12 due to overlay or capture software.
Enabled support for frame interpolation swapchain on Windows® 10 1909 and potentially earlier versions.
Fixed flipped disocclusion factor from previous and current backbuffer.
Fixed HDR mode issues in Cauldron sample.
Fixed MSVC C compile errors including ffx-api.
The AMD FidelityFX™ SDK 1.1.4 also updates the following to address select issues:
AMD FidelityFX™ Brixelizer GI 1.0.1
AMD FidelityFX™ Breadcrumbs 1.0.1