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Asset erase brush

Per-asset erase mask — paint to hide part of an image, restore to bring it back, all non-destructive.

The asset erase brush is a per-layer mask, not a global eraser. It lives in the Image Edit sheet → Erase tab and only operates on the asset layer you opened.

#Why it's separate from the global eraser

The global eraser (E) punches transparency through the draw layer's accumulated paint. It doesn't touch shapes, text, icons, or assets — those have their own visibility model.

The asset erase brush, by contrast, owns its own mask stored on the asset layer (assetEditState.eraseMask). It:

  • Affects only that one asset
  • Round-trips through .img as a separate asset-erase-mask resource
  • Can be partially undone via the Restore mode

#Modes

ModeWhat it does
ErasePaints into the asset's alpha mask. Painted pixels become transparent.
RestoreRemoves from the alpha mask. Previously-erased pixels come back.

Toggle in the panel. Both modes use the same brush size and softness sliders.

#Workflow

  1. Open the asset's edit sheet (double-click the asset, or click Edit image).
  2. Switch to the Erase tab.
  3. Pick brush size + softness.
  4. Paint to hide; switch to Restore to bring back.
  5. Close the sheet — the mask is stored on the layer and rendered live.

#Tips

  • For a clean cutout, use AI background removal first — it does the heavy lifting — then refine edges with the erase brush at low softness.
  • High softness (60+) is great for vignetting an image — paint a soft halo around the edges.
  • The mask is stored at the asset's native resolution, not the canvas's — so zooming in later still gives clean results.