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Wand Mask Node

By Kriss Norde

The Wand Mask creates a mask from a colored selection point (like the Photoshop Magic Wand). You click a pixel, and all the adjacent pixels of a similar color are included in the mask. Fast and handy for areas of uniform color - a lightweight alternative to keyers for simple cases.

Overview

The Wand Mask works like the Photoshop Magic Wand tool: you place a crosshair (Selection Point) on the area to select, and Fusion expands the mask to neighboring pixels of a similar color within the limit of the Range.

Not as precise as a real keyer, but effective for quickly masking an area of uniform color (blue sky, white wall, basic green background).

Where to find this node

  • Effects Library: Tools > Mask > Wand
  • Quick add: right-click in the Node Editor → Add Tool > Mask > Wand

Wand Mask vs Keyer (Delta/Chroma/Luma)

Wand Mask
Selection from a single point + range. Fast and simple. Less precise, few refinement options. For simple use cases.
Dedicated keyers
Delta Keyer, Chroma Keyer, Ultra Keyer: plenty of refinement options (spill, despill, edge softening, matte control, cleanup). For professional keying.

Rule of thumb: a quick mask of a uniformly colored area → Wand. Pro keying (green/blue screen, complex subjects) → dedicated keyers.

Inputs

  • Image Input (orange) - the source image the selection is made on.
  • Effect Mask (blue) - optional. A mask to combine through the Paint Mode.

Setup

Quick mask of a blue sky:
MediaIn → Wand Mask (Selection Point on the sky, Range 0.15)
       → connected to the Effect Mask of a Color Corrector

Isolating a plain wall:
MediaIn → Wand Mask (Selection Point on the wall, Color Space YUV, Range 0.1)
       → Effect Mask

Multi-wand mask (several areas):
MediaIn → Wand Mask 1 (area A) → Wand Mask 2 (area B, Paint Mode Add)
       → combined Effect Mask

Controls tab

Selection Point (X / Y)
A crosshair to place on the color to select. Fusion reads the pixel at these coordinates and finds all the similar pixels.
Color Space
The color space used for the analysis:
  • RGB: standard, based on the Red/Green/Blue components.
  • YUV: separates luminance (Y) and chrominance (UV). Often better for selecting a color while ignoring brightness variations.
  • HLS: Hue/Lightness/Saturation - to select by hue.
  • LAB: a perceptual color space - best for skin tones and subtle colors.
Channel
Channels used for the comparison: All, Alpha only, or individual R/G/B.
Range
Similarity tolerance. 0.0 = exact match only (very few pixels selected). Higher = more similar pixels included.
Range Soft Edge
Creates a semi-transparent falloff for colors close to the Range limit - a soft transition rather than a hard cut.
Soft Edge
Feathers the mask edges (spatially, unlike the Range Soft Edge, which works on color). Box/Bartlett/Multi-box/Gaussian filter.
Level
Mask opacity (0-1).
Paint Mode
How it combines with the incoming mask: Merge, Add, Subtract, Multiply, etc.
Invert
Inverts the mask.

Use cases

  • Quick sky mask - click the sky, adjust the Range → a uniform sky mask. For stylized sky replacement or localized grading (saturation boost).
  • Wall / uniform surface - mask a wall to add a texture, change its color, or isolate the surface for grading.
  • Basic green screen background - on footage with a clean, uniform green screen, the Wand Mask can be enough (quicker to set up than a Delta Keyer). For tricky keys, prefer a dedicated keyer.
  • Isolating a colored element - a bright red sign, a yellow ball, a costume piece → a quick mask for localized grading.
  • Cleaning up uniform areas - isolate the white background of a studio to add texture.
  • Quick preview / prototyping - try an idea before investing in a precise Polygon roto. The Wand Mask as a proof of concept.

Tips

  • YUV Color Space is often better than RGB - separating luminance and chrominance makes the selection more stable against brightness variations (shadows, highlights).
  • Increase the Range gradually - start low (0.05) and go up. Too low = a fragmented mask, too high = the mask spills onto unwanted areas.
  • Range Soft Edge for natural transitions - avoids hard color edges and softens the transition between included and excluded pixels.
  • Animatable Selection Point - if the color changes over time (e.g. changing light), animate the Selection Point on the right area to follow it.
  • LAB Color Space for skin - particularly good for selecting a skin tone while ignoring lighting variations.
  • Multiple Wand Masks with Add - if the area to mask has several different colors, combine several Wand Masks with Paint Mode Add.
  • For pro green/blue screen - don't insist on the Wand Mask. Switching to a dedicated keyer (the Delta Keyer in particular) gives incomparable results.
  • For very precise, pixel-perfect masks, prefer a Polygon or B-Spline with Roto Assist.