Roto

Mask

Interactive bezier spline rotoscoping. Draw precise mask shapes with curves, rectangles, and ellipses.

Roto provides interactive shape-based masking directly in the preview panel. Use the Pen tool to draw bezier splines for precise curved selections, or use Rectangle and Ellipse tools for quick geometric masks. Multiple shapes can be combined.

Auto-smooth mode automatically adds curve handles to pen points for smooth splines without manual handle adjustment.

Parameters

Output

Width pxInteger

Default: 1024 Range: 1–8192

Canvas width (used when no image connected)

Height pxInteger

Default: 1024 Range: 1–8192

Canvas height (used when no image connected)

Shapes

ShapesData

Default: []

Bezier spline/rect/ellipse shape definitions

Per-Shape

NameText

Default: Shape

Shape display name

CombineChoice

Default: 0 Range: 0–1

0 = Add, 1 = Subtract

Feather pxpixels-f

Default: 0.0 Range: 0.0–1000.0

Gaussian blur radius around shape edge

Opacity %0-1

Default: 1.0 Range: 0.0–1.0

Shape opacity (1.0 = fully opaque)

Global

InvertToggle

Default: false

Invert the final mask output

UI

Active ToolInteger

Default: 0 Range: 0–3

Select/Pen/Rect/Ellipse tool

Selected ShapeInteger

Default: -1 Range: -1+

Currently selected shape index

Auto-smoothToggle

Default: false

Auto-smooth new pen points

Show SourceToggle

Default: true

Show source image behind mask in preview

Usage Tips

Use the Pen tool for complex selections: click to add points, drag to add curve handles.
Enable Auto-smooth for fast curved selections without manually adjusting handles.
Combine multiple shapes in one Roto node; they’re automatically unioned.
Use the Select tool to adjust points and handles after drawing.