3D (Classic): Revolve (Classic) sweeps a profile with Angle, Cap and Offset and the classic surfaces

Effect › 3D and Materials › 3D (Classic) › Revolve (Classic)… sweeps the
profile round a vertical axis, as Revolve does, and draws every face with
the Wireframe, No Shading, Diffuse and Plastic surfaces of Extrude & Bevel
(Classic).

- `effect.apply` with `threeD.classicRevolve`: Angle (0 to 360), Cap,
  Offset (0 to 1000 pt) from the left or right edge of the profile's
  bounds, the Position rotation and Perspective, and the classic lights,
  Ambient Light, highlight, Blend Steps and Shading Color.
- Groups and layers revolve about one shared axis, and the effect also
  goes on a fill or stroke, as Revolve's does.
- `effect.lightingPreset` refuses it, as it refuses Extrude & Bevel
  (Classic).
- Revolve faces carry their view-space normal, and
  `three_d::revolve_facets` hands them to the classic surface code.
- Unknown parameters, numbers out of range and bad flags, edges,
  surfaces and colors are refused with an error.

docs/effects-parity.md

@@ -181,13 +181,13 @@ VectorCraft choices; an original approximation, never compared with another appl
 | Revolve | initial: live, editable profile, rotation and light gizmos, default-on Cap with continuous curved rims, smooth vector shading and round seam joins, 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, both sides, twist, taper and cap, Rotate of every fill and stroke, groups and layers turned about one shared axis (#4506), contours that cross, touch or overlap merged first ([three-d.md](three-d.md)), Position presets, rotation and light gizmos, SVG/PDF output, Expand Appearance ([three-d.md](three-d.md)) |
 | Materials panel, lighting, ray-traced render | Window › 3D and Materials panel with the object types (Plane, Extrude, Revolve, Inflate) and the Object, Rotation and Lighting settings of the applied effect ([three-d.md](three-d.md#3d-and-materials-panel)); one to ten directional lights with per-light Color (opaque RGB, white by default), Intensity, Rotation, Height, Softness and neutral Ambient Light, Revolve and colored Inflate use smooth vector shading; Extrude & Bevel and Rotate retain planar shading; original Standard, Diffuse, Top Left and Right lighting rigs; hard-edged shadows behind or below the object from the first light ([three-d.md](three-d.md#shadows)); no materials, soft shadows or ray tracing |
-| 3D (Classic): Extrude & Bevel, Revolve, Rotate | Extrude & Bevel (Classic) initial: live, Extrude Depth, Cap, five original bevel shapes with Height and Bevel Extent In or Out, Position presets and rotation gizmo, Perspective, Wireframe, No Shading, Diffuse and Plastic surfaces with one to ten lights, Light Intensity, Ambient Light, Highlight Intensity and Size, Blend Steps, Black, Custom or no Shading Color, Draw Hidden Faces ([create 3D objects](https://helpx.adobe.com/illustrator/desktop/special-effects-styles/create-3d-graphics/create-3d-objects.html)); Revolve (Classic), Rotate (Classic) and Map Art: none |
+| 3D (Classic): Extrude & Bevel, Revolve, Rotate | Extrude & Bevel (Classic) initial: live, Extrude Depth, Cap, five original bevel shapes with Height and Bevel Extent In or Out, Position presets and rotation gizmo, Perspective, Wireframe, No Shading, Diffuse and Plastic surfaces with one to ten lights, Light Intensity, Ambient Light, Highlight Intensity and Size, Blend Steps, Black, Custom or no Shading Color, Draw Hidden Faces ([create 3D objects](https://helpx.adobe.com/illustrator/desktop/special-effects-styles/create-3d-graphics/create-3d-objects.html)); Revolve (Classic) initial: live, Angle, Cap, Offset from the left or right edge, Position presets and rotation gizmo, Perspective, the same four surfaces, lights, highlight, Blend Steps and Shading Color, groups and layers revolved about one shared axis (same page); Rotate (Classic) and Map Art: none |
 | Turntable (30.0 beta) | none |
 | Export 3D objects (OBJ, USDA, glTF) | initial: Asset Export's Export 3D Object collects an object with Extrude & Bevel, Revolve, Inflate or Rotate as a 3D asset, and Export writes its solids as a USDA (the default), USDZ, glTF or OBJ mesh with a material in each solid's paint color (`assets.add3D`, `assets.set3DFormat`, `assets.export3D`); no textures, map art or shading ([3D export help](https://helpx.adobe.com/illustrator/desktop/special-effects-styles/create-3d-graphics/export-3d-vector-artwork.html)) |
 
 The `three-d` crate (depends on `geom` and `pathops`, with no UI or GPU dependencies) builds, rotates, projects, shades and depth-sorts the surfaces;
 the effects crate turns them into art. What's left (materials and shadows, ray-traced rendering,
-angular cut caps, exact visibility, the rest of 3D Classic (Revolve, Rotate, Map Art), Turntable) is 25–45 h.
+angular cut caps, exact visibility, the rest of 3D Classic (Rotate, Map Art), Turntable) is 25–45 h.
 
 ## Revision history
 

docs/gaps.md

@@ -663,7 +663,7 @@ macOS cursor delivery (#2292) is narrowed to a native host adapter using the exi
   Extrude & Bevel, Inflate and Rotate with Position presets ([three-d.md](three-d.md), #1407). Colored Inflate has automatic smooth vector lighting from shared membrane normals. White-light Inflate keeps its existing appearance. All four take one to ten colored directional lights, with neutral ambient applied once, a light list and independent previewing controls. Standard, Diffuse, Top Left and Right select original rigs, shared with commands; manual settings show Custom.
 - **Missing:** materials (base, Substance, graphics), shadows,
   ray-traced rendering, angular cut caps, exact visibility for intersecting and concave surfaces, the rest of 3D
-  Classic (Revolve, Rotate, Map Art), Turntable, textures, map art and shading in 3D export.
+  Classic (Rotate, Map Art), Turntable, textures, map art and shading in 3D export.
 - **Impact:** specialist; Materials is the one menu stub left.
 - **Estimate:** 25–45 h; plan in `plan/` before coding.
 

docs/mcp.md

@@ -3078,8 +3078,8 @@ See [Revolve](revolve.md) for the scope and limitations.
 replaces the lighting rig and ambient of an existing Revolve, Extrude & Bevel, Inflate or Rotate
 effect. `item: null` addresses object-level effects; an item index addresses a fill/stroke's
 effects. All targets must have a 3D effect at `index`, otherwise nothing changes. Extrude & Bevel
-(Classic) has no lighting presets: a target with it at `index` is an error, nothing changes, and
-`effect.setParams` sets its lights. The operation is one undo step and preserves Shading, geometry, source paint and the view.
+(Classic) and Revolve (Classic) have no lighting presets: a target with either at `index` is an error, nothing
+changes, and `effect.setParams` sets its lights. The operation is one undo step and preserves Shading, geometry, source paint and the view.
 
 The four original rigs use one white front light at 80% intensity. Standard keeps the existing
 default; Diffuse uses 100% Softness and 35% Ambient Light, Top Left uses Rotation 135 and Height
@@ -3111,7 +3111,7 @@ art", and a loaded file draws the source path, as it does for a solid past its l
 documentation names the controls and their ranges
 ([3D and Materials panel options](https://helpx.adobe.com/illustrator/desktop/special-effects-styles/create-3d-graphics/3d-materials-panel-options.html)).
 The settings are saved in the native file; SVG and PDF exports draw the shadow, and `effect.expandAppearance` keeps
-it as a path. Extrude & Bevel (Classic) has no shadow. See [three-d.md](three-d.md#shadows).
+it as a path. Extrude & Bevel (Classic) and Revolve (Classic) have no shadow. See [three-d.md](three-d.md#shadows).
 
 ```json
 {"name":"run_command","arguments":{"command":"effect.setParams","params":{"index":0,"item":null,"params":{"shadow":true,"shadowPosition":"below","shadowDistance":10,"shadowBounds":150}}}}
@@ -3187,6 +3187,28 @@ an unknown surface or shading color is refused with an error and the document is
 {"name":"run_command","arguments":{"command":"effect.apply","params":{"effect":"threeD.classicExtrude","item":null,"params":{"depth":40,"bevel":"rounded","bevelHeight":6,"surface":"diffuse","blendSteps":64}}}}
 ```
 
+## Revolve (Classic)
+
+`effect.apply {effect: "threeD.classicRevolve", params: {...}, ids?, item?}` is Effect › 3D and Materials ›
+3D (Classic) › Revolve (Classic)…. It sweeps the profile round a vertical axis as `threeD.revolve` does, at 64 segments
+for a full turn, and draws every face, back to front, with the classic surfaces. Parameters: `angle` (degrees,
+0..360, default 360), `cap` (true closes the profile's open ends, false leaves the surface hollow), `offset` (points,
+0..1000, default 0; the axis's distance from the profile, so a value above 0 makes a ring), `edge` (`left`, the
+default, or `right`: the edge of the profile's bounds the axis is at), `rotationX/Y/Z` and `perspectiveAngle` as
+above, and `surface`, the lights, `ambient`, `highlightIntensity`, `highlightSize`, `blendSteps`, `shadingColor` and
+`shadingCustom` as Extrude & Bevel (Classic) takes them. It has no `drawHiddenFaces`. The effect also goes on a group
+or layer, whose members turn about one shared axis, or on a fill or stroke. The public documentation describes the
+dialog ([Create 3D objects](https://helpx.adobe.com/illustrator/desktop/special-effects-styles/create-3d-graphics/create-3d-objects.html))
+and its Angle (0 to 360), Cap, Offset (0 to 1000) and Left Edge or Right Edge settings
+([Revolve options](https://helpx.adobe.com/pdf/cs6/illustrator_reference.pdf#page=283));
+the defaults are VectorCraft's own. An unknown parameter (`segments` included), a number out of range, a flag that
+is not true or false, another `edge`, surface or shading color is refused with an error and the document is not
+changed.
+
+```json
+{"name":"run_command","arguments":{"command":"effect.apply","params":{"effect":"threeD.classicRevolve","item":null,"params":{"angle":270,"offset":10,"surface":"diffuse","blendSteps":64}}}}
+```
+
 
 ## Edit Colors and Recolor Artwork
 

docs/three-d.md

@@ -141,7 +141,7 @@ them all. The members stay editable: moving or editing one reshapes the solids.
 
 ## Clipping groups, blends and symbol instances
 
-Every 3D effect (Extrude & Bevel, Extrude & Bevel (Classic), Inflate, Rotate and Revolve) also applies to a clipping
+Every 3D effect (Extrude & Bevel, Extrude & Bevel (Classic), Inflate, Rotate, Revolve and Revolve (Classic)) also applies to a clipping
 group, a blend or a symbol instance, alone or inside a group or layer. The help page says that effects apply to
 objects, groups or layers ([Apply and modify effects](https://helpx.adobe.com/illustrator/desktop/special-effects-styles/apply-filter-effects/apply-and-modify-effects.html)),
 that a clipping mask hides everything outside its shape ([Clipping masks](https://helpx.adobe.com/illustrator/using/clipping-masks.html)),
@@ -279,7 +279,7 @@ Our reading:
   command is refused with "The 3D shadow is too complex; turn Shadows off or simplify the art", and a loaded
   file draws the source path.
 - Canvas, SVG and PDF exports draw the shadow, the art's bounds take it in, and Expand Appearance keeps it as a
-  path below the faces. Extrude & Bevel (Classic) has no shadow.
+  path below the faces. Extrude & Bevel (Classic) and Revolve (Classic) have no shadow.
 
 ## Parameters (`effect.apply`, `effect.setParams`)
 
@@ -336,8 +336,10 @@ out, perspective). No Adobe software, assets, presets or bevel shapes were used.
   outline crosses. An outline of tens of thousands of points that crosses nearly every cell (a comb of 4,000 teeth
   across the shape) is refused because the 3D surface is too complex; a closed path of 65,536 points round a
   circle builds.
-- **3D (Classic)**: Extrude & Bevel (Classic) is built, with its surface types and blend steps. Revolve (Classic),
-  Rotate (Classic), the track cube, map art, Turntable and 3D export are separate, unbuilt items.
+- **3D (Classic)**: Extrude & Bevel (Classic) and Revolve (Classic) are built, with their surface types and blend
+  steps. Revolve (Classic) sweeps the surface Revolve sweeps, at 64 segments for a full turn, and draws every face back
+  to front, so it has no Draw Hidden Faces setting. Rotate (Classic), the track cube, map art, Turntable and 3D export
+  are separate, unbuilt items.
 
 Release measurements and a repeatable CLI scene are in [3D lighting performance](3d-lighting-performance.md).