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

Pins

ImageImage

InputOptional

MaskMask

Output

Width (px)Integer

Default: 1024 Range: 1–8192

Output mask width

Height (px)Integer

Default: 1024 Range: 1–8192

Output mask height

Shapes

ToolChoice

Default: 1 Range: Select / Pen / Rect / Ellipse

Active editing tool in the manipulator

Selected ShapeInteger

Default: -1 Range: -1–9999

Currently selected shape index (-1 = none)

Auto SmoothToggle

Default: true

Auto-smooth bezier handles when adding pen points

ShapesData

Default: []

Bezier shape list (edited via the canvas manipulator)

Global

OverlayToggle

Default: true

Show the mask as a tinted overlay on the input

InvertToggle

Default: false

Invert the entire mask output

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; shapes default to Union but can be set to Subtract individually.
Use the Select tool to adjust points and handles after drawing.