This effect displays circles at the coordinates contained in the input array. These circles, or blobs, act as masks and can either reveal an underlying image at their position, or act as black masks on top of a displayed image.


Array properties

Any properties in the input array that matches the name of these properties will be used and displayed accordingly.
These properties can also be shown as inputs on the node by toggling the icon.
In the dropdown menu you can choose how values from the array interact with values from the Editor panel or the input between : Replace, Add or Multiply.
More information can be found on the GPU Multi category page.

  • X : Sets the X value for the coordinates of the effect.
    Default : WIDTH ÷ 2
  • Y : Sets the Y value for the coordinates of the effect.
    Default : HEIGHT ÷ 2
  • Radius : Sets the radius of the maskblobs
    Default : WIDTH ÷ 10
  • Softness : Sets a softness on the maskblobs. Operates between 0 (no softness, sharp edges) and 1 (much softness) by default. This value has no upper limit, however, a value too high will eventually make your maskblobs disappear.
    Default : 0.1

Global properties

  • is Persistent : Toggle to activate or deactivate the persistence of the blobs and what they reveal/hide.
    Default : OFF
  • Persistence : Sets the amount of persistence. A value of 0 means no persistence while a value of 1 means full persistence (no dissolve)
    Default : 1.0


This lists only the inputs present by default at the creation of the node. The inputs that appear can be tuned by toggling the button in the Editor panel.

Name Type Description
Array Array Array input containing at least the positions to draw at
Image Image Use this input if you want the blobs to be black masks over an image
Background Image Use this input if you want the blobs to reveal parts of a hidden image
IsPersistent Boolean Activate/Deactivate the persistence
Persistence Float Amount of persistence to apply


Name Type Description
Image Image Image output of the effect


In this example :
  • Radius : 150
  • Softness : 0.75
  • Is Persistent : ON
  • Persistence : 0.5

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