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Mask Apply

Node icon
Mask

Applies a mask as the alpha channel of an image. This is the standard way to cut out, reveal, or restrict image areas.

Mask Apply takes an image and a mask, and combines them. In Cut Out mode, the mask becomes the image’s alpha: white areas remain visible, black areas become transparent. Multiply Alpha multiplies the existing alpha by the mask. Intersect keeps only the overlap.

This is how you convert a mask selection into an actual transparency cutout.

Parameters

Section titled “Parameters”

Pins

ImageImage
InputRequired
MaskMask
InputRequired
ImageImage
Output

Mask

ModeChoice
Default: Cut Out

How the mask is combined with the image's alpha channel

  • Cut OutReplace the image's alpha with the mask — white areas visible, black areas transparent.
  • Multiply AlphaMultiply the existing alpha by the mask — preserves existing transparency while adding the mask effect.
  • IntersectKeep only pixels where both the image and mask are opaque.

Usage Tips

Section titled “Usage Tips”
  • Use Cut Out to remove backgrounds (white mask = visible, black mask = transparent).
  • Multiply Alpha preserves the image’s existing alpha while adding the mask on top.
  • Wire multiple Mask Apply nodes in series to combine several mask effects.
  • Image and mask must have identical dimensions or the node will error. Resize one input to match if needed.
  • Use Intersect to keep the tighter of two alpha boundaries, useful when both image and mask carry meaningful alpha.
Section titled “Related Nodes”