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®.
Download the latest version - v1.0
Download the latest version - v1.1
This release includes:
- Now part of AMD FidelityFX SDK.
- Various fixes.
Part of the AMD FidelityFX™ SDK
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.
A set of guidelines for developers on how to present options in the game’s user interface to enable/disable AMD FidelityFX Effects.
Find out what developers are saying about AMD FidelityFX.
Version history
- Initial release
All part of the FidelityFX SDK!
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