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Mask Workspace

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The Mask workspace generates masks — definitions of which parts of a video get edited and which stay intact. Masks are used primarily by Mago Inpaint, but can also be downloaded for external compositing.

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When to use masks

Mask-based editing fits when:
  • Only a specific element needs to change (a character’s shirt, a single prop, the background only).
  • The rest of the video must be preserved exactly.
  • Repeated targeted edits are needed (mask once, apply many times).
⚠️ Warning — Don’t use a mask when the entire frame needs to transform. Use Mago Transform or Mago Style Transfer instead.

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Mask generation modes

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Points editor

Points editor in use.
  1. Click the Points selector to open the editor.
  2. Switch to Add mode and click to mark areas inside the mask.
  3. Switch to Remove mode to mark areas excluded from the mask.
  4. Click any placed point to delete it individually.
  5. Use Clear All to start over.
  6. Switch frames if needed — the visual selection is anchored to the chosen frame. (Selection on any frame is being rolled out.)

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Settings

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Invert mask — example

The white area is what gets edited. To change the background while leaving the subject intact: mask the subject with a prompt, then enable Invert mask.

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Mask tracks

Mask renders appear in a dedicated timeline that shows only mask tracks in this workspace. Each mask track can be:
  • Used as input to Mago Inpaint in Render Video.
  • Downloaded for external compositing software.
  • Compared with the source via slider or side-by-side.
  1. Always run a few test masks before committing to a render.
  2. Use the comparison slider to verify coverage against the source.
  3. If the mask is too tight, increase Expand by 5–10 px.
  4. If edges look hard in the final result, increase Blur.
  5. For multi-element scenes, use Prompts + Points for highest reliability.
📐 Pixel fidelity — Mago Inpaint, like virtually every video model, does not operate in pure pixel space. Unmasked regions can shift slightly (brightness, color) due to compression during processing. For pixel-perfect preservation: download the mask, run the Inpaint render, then composite the result against the original source in DaVinci, After Effects, or Fusion using the downloaded mask. See Export & compositing.
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