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.. index:: Compositor Nodes; Mask
.. _bpy.types.CompositorNodeMask:
*********
Mask Node
*********
.. figure:: /images/compositing_node-types_CompositorNodeMask.webp
:align: right
:alt: Mask Node.
The Mask node can be used to select a :doc:`Mask data-block </movie_clip/masking/index>`.
This node can be used with other nodes, for example to Invert, Multiply or Mix, or used as a factor input.
Inputs
======
This node has no input sockets.
Properties
==========
Masks
The selectable mask data-block. If the label is left blank, the mask name will be set.
Feather
Use or ignore feather points defined for splines see :ref:`Mask Feathers <mask-feather>` for more details.
Size
Scene Size will give an image the size of the render resolution for the scene,
scaling along when rendering with different resolutions. Fixed gives a fixed size in pixels.
Fixed/Scene gives a size in pixels that still scales along
when changing the render resolution percentage in the scene.
Motion Blur
For animated masks, creating a motion blurred mask from the surrounding frames,
with a given number of samples (higher gives better quality), and a camera shutter time in seconds.
Outputs
=======
Mask
The black-and-white output of the mask.
Example
=======
.. figure:: /images/compositing_types_input_mask_example.png
Example of the Mask node.
In the example above, the *Mask* node is used to isolate the object from the background
to preserve it from being corrected.
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