AMD FidelityFX™ Variable Shading (VS) provides an open source header implementation to easily integrate Variable Rate Shading into your game. The effect works by analyzing luminance variance in the previous frame and uses motion vectors to generate a shading rate image.
Supports:
- DirectX®12 Ultimate.
- Vulkan®.
Part of the AMD FidelityFX™ SDK
Download the latest version - v1.0
Download the latest version as part of FidelityFX SDK v1.1
Updated as part of AMD FidelityFX SDK v1.1:
- AMD FidelityFX backend updates, including buffer allocator overrides
- Updated documentation and release of reference documentation for SDK + Framework
- Native Microsoft® GDK® backend implementation library (requires developer access to GDK® program)
Xbox developer?
An example use of AMD FidelityFX Variable Shading exists within the Xbox Game Development Kit samples.
Features
State-of-the-art algorithm
Optimized for Shader Model 6.0+
Open source, MIT license
Details
Features of the implementation:
- AMD RDNA™ 2-optimized algorithm.
- Support for Direct3D®12 API.
- Shaders written in HLSL utilizing SM 6.0 wave-level operations.
A sample application is provided for Direct3D®12.
Comparison
 |
Full Shading Rate |  |
2×1 or 1×2 Shading Rate |  |
2×2 Shading Rate |
See AMD FidelityFX Variable Shading in action with DIRT® 5
Additional resources
Engineer Stephan Hodes provides a short description how VRS works, and how AMD’s FidelityFX Variable Shading technique can assist with integrating VRS into your engine.
Find out what developers are saying about AMD FidelityFX.
Version history
Updated as part of AMD FidelityFX SDK v1.1:
- AMD FidelityFX backend updates, including buffer allocator overrides
- Updated documentation and release of reference documentation for SDK + Framework
- Native Microsoft® GDK® backend implementation library (requires developer access to GDK® program)
- Now part of AMD FidelityFX SDK.
- Various fixes.
All part of the FidelityFX SDK!
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The AMD FidelityFX SDK is our easy-to-integrate solution for developers looking to include FidelityFX features into their games.
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