Fast Blur - High Performance Blur Post Processing Effect for URP
Ilumisoft
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Fast Blur is a performance-optimized, high quality fullscreen blur effect for Unity’s URP. Easily added as a post-processing override, it delivers smooth, adjustable blur - ideal for UI and VFX.Fast Blur is a performant, high-quality fullscreen blur effect built for the Universal Render Pipeline (URP) in Unity 6. Designed as a post-processing override, it integrates seamlessly with Unity’s Volume System and delivers smooth, adjustable blur effects - perfect for UI backgrounds, cutscenes, and in-game VFX.✨ Key Features🎯 Performance-Conscious DesignDelivers a substantial performance improvement over traditional blur techniques like box or Gaussian blur, while still providing high visual fidelity.🔁 Iterative Blur AlgorithmCombines multiple downsampling and upsampling passes with smart interpolation to deliver high-quality results with fewer samples and lower performance impact.🎚️ Volume-Based ControlFully compatible with Unity’s volume system. Adjust blur intensity smoothly at runtime using post-processing volumes.⚙️ Renderer Feature IntegrationEasy setup as a URP Renderer Feature - just add it to your Renderer Asset and configure your volumes.🛠️ Flexible ApplicationsIdeal for blurring UI backgrounds, creating atmospheric effects, or enhancing transitions with minimal setup.⚡ Smarter Blur for Real-Time ProjectsWhile any fullscreen blur effect has a performance cost, Fast Blur is engineered to minimize that impact - offering one of the most efficient blur solutions available for URP. It's a practical choice for developers who want polished visual effects without the steep overhead of conventional blur methods.Fast Blur has been exclusively designed for Unity 6 or higher and the Universal Render Pipeline. It has been implemented as a URP Renderer Feature, using Unity's new Render Graph system. The effect is fully compatible with Unity’s Volume system and can be controlled using a post-processing override.RequirementsUnity 6 or higherUniversal Render Pipeline (URP)FeaturesFullscreen post-processing blur effectIntegrated as a URP Renderer FeatureVolume override with adjustable intensityEfficient multi-pass blur algorithm (downsampling & upsampling)Designed for real-time performanceFast Blur's down- and upsample blurring approach is based on the iterative Dual Blur method presented in "Bandwidth-Efficient Rendering" by Marius Bjørge at SIGGRAPH 2015. In our implementation of the technique, we have introduced a custom interpolation system for smooth intensity transitions, making it ideal for dynamic real-time effects.In the screenshots, we compared fast blur to a common two pass gaussian blur implementation with 32 samples on a 4K output.
