3D and Materials: Inflate takes Twist, Taper and Cap

The public 3D and Materials panel options list Depth, Twist, Taper and Cap
for every 3D type; Inflate had only Depth.

- Twist (0° to 360°) and Taper (1–100 %) turn and scale the back about the
  shape's centre, as Extrude & Bevel's do: a puffed back is turned and
  lowered in proportion, and the sides follow in slices.
- Cap: Solid closes the back; Hollow leaves it off, so the inflated front is
  a shell open behind. The documentation doesn't say what Cap means for
  Inflate; this reading is stated in docs/three-d.md.
- The dialog's Object tab shows them in the documented order (Depth, Twist,
  Taper, Cap), then Volume and Both sides.

At 0 % volume a twisted, tapered Inflate has the extrusion's outline from
every side (tested).

A twisted, tapered, hollow Inflate draws on the canvas exactly as it
exports, and expands to faces with their own ids (tested). ROADMAP and the
parity pages list the new options; the 3D score stays at ~25 %.

docs/effects-parity.md

@@ -1,6 +1,6 @@
 # Effects parity
 
-> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-12 · **Change:** minor (3D and Materials: Extrude & Bevel, Inflate and Rotate added, ~8% → ~25%; G2: Film Grain added; Photoshop effects 29/57; 28 filters remain) · **Target:** Adobe Illustrator 2026 (30.x)
+> **Last reviewed:** 2026-10-10 · **Last updated:** 2026-10-13 · **Change:** minor (3D and Materials: Inflate takes Twist, Taper and Cap; score unchanged) · **Target:** Adobe Illustrator 2026 (30.x)
 
 Every entry of Illustrator's Effect menu, by its public feature name, against VectorCraft's effects catalogue
 (`effect_catalog()` in `crates/effects/src/lib.rs`) and the Effect menu built from it
@@ -85,7 +85,7 @@ not an accuracy guarantee for arbitrary artwork. Tests: `pixel::tests::film_grai
 | Item | Ours |
 |---|---|
 | Revolve | initial: live, editable profile, rotation and light gizmos, flat shading, SVG/PDF output, Expand Appearance ([revolve.md](revolve.md), #846) |
-| Extrude & Bevel, Inflate, Rotate | initial: live, depth, twist, taper, solid or hollow caps, five original bevel shapes, Inflate volume and both sides, Rotate of every fill and stroke, Position presets, rotation and light gizmos, SVG/PDF output, Expand Appearance ([three-d.md](three-d.md)) |
+| Extrude & Bevel, Inflate, Rotate | initial: live, depth, twist, taper, solid or hollow caps, five original bevel shapes, Inflate volume, both sides, twist, taper and cap, Rotate of every fill and stroke, Position presets, rotation and light gizmos, SVG/PDF output, Expand Appearance ([three-d.md](three-d.md)) |
 | Materials panel, lighting, ray-traced render | one directional light with flat shading only; no materials, several lights, light colour, shadows or ray tracing |
 | 3D (Classic): Extrude & Bevel, Revolve, Rotate | none |
 | Turntable (30.0 beta) | none |
@@ -99,6 +99,7 @@ Revolve caps, 3D Classic, Turntable, 3D export) is 25–45 h.
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-10-13 | minor | Inflate takes Twist, Taper and Cap ([three-d.md](three-d.md)); 3D stays ~25%, 25–45 h: materials, lights and shadows are the bulk of what remains |
 | 2026-10-12 | minor | Extrude & Bevel, Inflate and Rotate (initial, [three-d.md](three-d.md)); 3D ~8% → ~25%, 45–75 → 25–45 h |
 | 2026-10-12 | minor | G2: Artistic › Film Grain added with live controls and raster exports; measured Photoshop filters 29/57, 28 remaining (23–39 h). |
 | 2026-10-11 | minor | PDF cap warnings identify original objects after appearance splitting and report the lowest achieved ppi; cap/rendering and scores unchanged |

docs/mcp.md

@@ -952,7 +952,8 @@ the other 3D types to a path or compound path, live like Revolve (the source sta
 `threeD.extrude`: `depth` (points, 0..2000, default 50), `twist` (degrees, 0..360, 0), `taper` (1..100%, 100),
 `cap` (true solid, false hollow), `bevel` (`none`, `classic`, `rounded`, `cove`, `step`, `ogee`), `bevelWidth`
 and `bevelHeight` (points, default 4), `bevelRepeat` (1..32), `bevelSpace` (0..90%), `bevelInside`,
-`bevelBothSides`. `threeD.inflate`: `depth` (points, default 0), `volume` (0..100%, default 50), `bothSides`.
+`bevelBothSides`. `threeD.inflate`: `depth` (points, default 0), `twist` (degrees, 0..360, 0), `taper` (1..100%, 100), `cap` (true
+solid, false open behind), `volume` (0..100%, default 50), `bothSides`.
 All three take `rotationX/Y/Z` (degrees, -180..180, default the Off-Axis Front position -21.88/-23.4/9.06),
 `perspective` and the lighting parameters as Revolve. See [three-d.md](three-d.md) for the Position presets,
 the scope and what differs from the public documentation.

docs/target-app-parity.md

@@ -457,7 +457,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
 - **Geometry and effects:**
   - Pathfinder (10 exact curve booleans; single-result shape operations retain source names and SVG IDs, #1293), Offset, Outline Stroke, Simplify, Clean Up, Split Into Grid, Divide Objects Below. With one group selected alone, the Pathfinder panel's buttons work on its members (among other selected objects a group still acts as one shape), and a greyed-out button says what it needs (#1450; behaviour reference: [combine objects using Pathfinder effects](https://helpx.adobe.com/illustrator/desktop/manage-objects/reshape-transform-objects/combine-objects-using-pathfinder-effects.html); one plain path selected alone stays disabled, which the documentation doesn't settle). Split Into Grid takes the number, height or width, gutter and total of the rows and of the columns, Add Guides and Preview, and several selected paths become one grid painted as the topmost one (#1462, `object.path.splitIntoGrid`; behaviour reference: [divide or split objects](https://helpx.adobe.com/illustrator/desktop/manage-objects/edit-objects/divide-or-split-objects.html); a typed height or width keeps the gutter and changes the total, our choice). Object › Path › Remove Anchor Points (`path.removeAnchors`) removes the direct-selected anchors without opening their paths (the Delete key still deletes them with their segments): the neighbours keep their handle directions and their facing handles are refitted so one cubic follows the two old segments, and straight sides stay straight. The Delete Anchor Point tool uses the same refit. The Control bar, the contextual task bar, the Properties quick actions and the canvas context menu offer it when anchors are selected. With anchors selected, the Control bar and the Properties panel also convert them to corner or smooth (`path.convertAnchors`), connect end points (Join) and cut the path at them (`path.cutAtAnchors`, also on the task bar and the context menu): a closed path opens there and an open one becomes one path per piece, each cut leaving one of its two coincident anchors selected so a drag pulls the path apart.
   - Divide uses open lines, bent paths and curves as cutting edges (#1307), preserving the frontmost filled face's appearance and holes. Engine tests cover implicit closure of filled open contours and unrelated objects; native automation confirms independent piece movement, one Undo/Redo, canvas/window captures and an exact saved-document read by a separate CLI process. The shared planar map retains its 4,096-segment cap and filled-area fallback; other Pathfinder operations are unchanged.
-  - Extrude & Bevel, Inflate and Rotate (Effect › 3D and Materials): live effects in the `three-d` crate with depth, twist, taper, solid or hollow caps, five original bevel shapes (width, height, repeat, spacing, inside, both sides), Inflate's volume and both sides, Rotate's turned fills and strokes, Position presets, the rotation and light gizmos, SVG/PDF vector output and Expand Appearance; one 3D effect per object; covered by geometry, effect, canvas-versus-export, command and dialog tests ([three-d.md](three-d.md)).
+  - Extrude & Bevel, Inflate and Rotate (Effect › 3D and Materials): live effects in the `three-d` crate with depth, twist, taper, solid or hollow caps, five original bevel shapes (width, height, repeat, spacing, inside, both sides), Inflate's volume, both sides, twist, taper and cap, Rotate's turned fills and strokes, Position presets, the rotation and light gizmos, SVG/PDF vector output and Expand Appearance; one 3D effect per object; covered by geometry, effect, canvas-versus-export, command and dialog tests ([three-d.md](three-d.md)).
   - Initial live Revolve (#605, #846): a portable geometry and shading crate (`three-d`), editable path and compound profiles, compact options with artboard rotation and light gizmos, SVG/PDF vector output and Expand Appearance that can trim covered faces. Open ends are uncapped, shading is flat with one light, and intersecting surfaces' visibility is approximate ([revolve.md](revolve.md)).
   - Live effects with previewing dialogs: Distort & Transform, Path, Convert to Shape, 15 Warp styles, Round Corners, Scribble, Effect → Pathfinder (all 10 operations, live on groups; several loose objects are grouped first, in one undo step), Color Adjustments (Brightness/Contrast, Curves, Levels, Hue/Saturation, Shift to Color, Temperature/Tint, on vectors, live type and embedded images), and raster drop shadow, glows and feather. SVG and PDF export keep live effects (geometry baked; SVG raster effects as filters).
   - **Simplify feedback and component selection (#1272):** the existing tolerance dialog previews from the original interaction snapshot and shows original/new anchor counts. Preview off and Cancel restore the document and selection; OK is one Undo. A refit or Add Anchor Points clears component indexes only on paths whose geometry changes, keeping their objects selected whole and unchanged paths' components intact. Engine and real-egui frame regressions cover document/selection restoration and grouped paths.
@@ -528,6 +528,7 @@ Moved from the ROADMAP's "Shipped so far" on 2026-10-10. Update it when a featur
 | Date | Change | Summary |
 |---|---|---|
 | 2026-10-13 | minor | Image Trace, measured in `image-trace-quality.md`: the palette is made of the picture's own colours (#1504): 16 Colors on flat art 70 → 4.2 paths and 5.1 → 0.13 px off, paths in a colour the art lacks 5.9 → 0; photos are smoothed within their tones first and stacked layers go by lightness (#1516): High Fidelity Photo 3,653 → 121 paths with its colour error 2.30 → 1.75, 16 megapixels traced where 4 were refused. Score and hours unchanged (estimated) |
+| 2026-10-13 | minor | 3D and Materials: Inflate takes Twist, Taper and Cap ([three-d.md](three-d.md)); scores unchanged (3D ~25%) |
 | 2026-10-13 | minor | Automation: a command run through MCP, the control channel or the CLI refuses a parameter key it doesn't take, naming it and the nearest accepted key (#1496, fixes #1442; 598 of 737 engine commands checked, 168 params descriptions corrected); plug-ins: a numeric parameter's default stays inside its declared range (#1463); stability: a window surface larger than 8192 px is configured up to the graphics adapter's limit instead of closing the app (#1495, part of #1459; not reproduced on a mixed-scale setup); text frames, wrap shapes and type paths beyond a billion points hold no text instead of hanging the layout (#1451); scores and hours unchanged (estimated) |
 | 2026-10-13 | minor | File formats: PDF and `.ai` import keep a stroke opaque and unmasked when the fill under it was faded or masked by its group, and a `.ai` read as its PDF part keeps its RGB numbers (#1434); SVG export writes knockout groups of opaque art without masks, and `convert` takes `--decimals` (#1435); grayscale TIFFs with an alpha channel or other extra channels place, relink and open (#1489, part of #1466; colourising 1-bit and grayscale images is still open); score and hours unchanged (estimated) |
 | 2026-10-13 | minor | Path operations and transforms: Split Into Grid has its row and column sizes, gutters, totals, Add Guides and Preview (#1488, fixes #1462); the Pathfinder panel works on a group selected alone (#1493, for #1450; one plain path alone is not settled by the documentation); Transform Objects in the Transform dialogs and Transform Each, and Reflect across an angle (#1494, fixes #1448 and #1460); Fit Headline in a frame one line tall (#1445, fixes #1444); value fields: selected text is readable (#1490, part of #1465) and a focused field follows its value (#1497, fixes #1457); the many-object edits of #1430 and #1464 are under Performance already; scores and hours unchanged (estimated) |

docs/three-d.md

@@ -44,6 +44,9 @@ middle.
 | Option | What it does |
 |---|---|
 | Depth | 0–2,000 pt of flat side between the front and the back. |
+| Twist | 0° to 360°: the back turned against the front (its puff too), the sides following in slices. |
+| Taper | 1–100 %: the back's size against the front's; a puffed back is lower in proportion. |
+| Cap | **Solid** closes the back; **Hollow** leaves it off, so the inflated front is a shell open behind, its inside showing. The public documentation lists Cap for every 3D type without saying what it means for Inflate; this is our reading. |
 | Volume | 0–100 %. The surface is a membrane under even pressure, held along the outline (and around holes): it rises vertically from the edge and rounds smoothly inside, without creases along the shape's middle. At 50 % a circle becomes a half sphere; 100 % puffs twice as high, 0 % is flat. |
 | Both sides | The back puffs out too; otherwise it is flat. |