BlurEffect
The BlurEffect applies a Gaussian blur to the entire rendered game world. The strength of the blur is controlled by the BlurEffect.Size. Only one BlurEffect can be applied at once (the instance with the greatest Size takes priority).
Like other post-processing effects, BlurEffect will only work while Enabled and when parented to Lighting or Workspace.CurrentCamera. Also, it may render differently on low-end devices and/or depending on your Studio settings (see the Quality Level settings in Rendering → Performance).
For more details on this effect and others, see Post-Processing Effects.
Summary
Properties
Determines the blur radius.
Toggles whether or not the PostEffect is enabled.
Properties
Size
Size controls the blur radius, measured in pixels. The larger the size, the blurrier the screen will become.