Global Composition Blur

intermediate concepts

Volumetric Lights 2 (URP) · Core Concepts

Global Composition Blur

The Volumetric Lights Render Feature renders all volumetric lights to an off-screen buffer and applies screen-space blur before compositing the result onto the camera image. This produces smoother, higher-quality results on desktop.

Note: This render feature is not necessary on mobile devices with high-density screens, where per-pixel banding is less noticeable.

Adding the Render Feature

  1. Select your URP Renderer asset (e.g., ForwardRenderer).
  2. Click Add Renderer Feature > Volumetric Lights Render Feature.
Adding the Volumetric Lights Render Feature

Settings

Render Feature settings
ParameterDescriptionDefault
Blend ModeBlending mode for the final composition pass.Additive
BrightnessGlobal brightness multiplier applied on top of individual light brightness values.1
DownscalingReduces the resolution of the intermediate light buffer. Improves performance.1 (off)
Blur PassesNumber of blur iterations. Higher values produce a softer result.2
Blur DownscalingReduces blur buffer resolution. Improves performance at quality cost.1
Blur SpreadIncreases the blur kernel radius for broader softening.1
HDRUses HDR format for blur buffers to preserve bright colors.On
Preserve EdgesEnables a bilateral filter to preserve geometry edges during the blur pass.Off
Was this page helpful?