A boolean group takes a corner radius (and corner smoothing): the Design panel shows the field for it, `node.set cornerRadius` writes it, and the renderer rounds every sharp corner of the group's result after the fold, convex and concave alike. Layers inside keep their own radius and do not stack with it, a radius larger than the edges allow shrinks to fit while the field keeps the typed value, Flatten bakes the arcs, and a mixed selection reads Mixed. Measured in Figma's web app on 2026-11-10.
The rounded result is cached apart from the fold (keyed by the folded path, radius and smoothing), so scrubbing the radius never redoes the boolean steps. The .fig and REST importers and the .fig exporter now carry the radius and smoothing of a boolean group, and paste properties and radius variables reach it. Docs: ui-parity, target-app-parity, gaps, file-format-parity, ROADMAP, mcp.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Model-Effort: Opus 5.5 drove; Fable 5.1 designed; Sonnet 5.5 wrote at medium
Each sweep takes at most 250 000 segments and 2 million possible crossings (pairs of segments whose bounds overlap, counted in O(n log n)), and a fold at most 4 million segments swept over its steps; past them the operation is refused with PathOpsError::TooComplex before it runs. A boolean group past the caps draws without its result, with a warning once, and the refusal is cached; vector.flatten refuses it instead of dropping it.
Boolean operands are editable in place with live results (per-operand operations, cached prefixes so a drag recomputes from the edited operand up); a Design panel Arc section; the shape builder takes strokes and open paths as outlined areas; variable width points can be wider on one side.
Trevor BrownandClaude Sonnet 5.5
BFlat