Update KCL docs

content/pages/docs/kcl-lang/arithmetic.md

@@ -18,7 +18,7 @@ KCL supports the usual arithmetic operators on numbers and logic operators on bo
 | `\|` | Logical 'or' |
 | `!` | Unary logical 'not' |
 
-KCL also supports comparison operators which operate on numbers and produce booleans:
+KCL also supports comparsion operators which operate on numbers and produce booleans:
 
 | Operator | Meaning |
 |----------|---------|
@@ -29,7 +29,7 @@ KCL also supports comparison operators which operate on numbers and produce bool
 | `<=` | Less than or equal |
 | `>=` | Greater than or equal |
 
-Arithmetics and logic expressions can be arbitrarily combined with the usual rules of associativity and precedence, e.g.,
+Arithmetics and logic expressions can be arbitrairly combined with the usual rules of associativity and precedence, e.g.,
 
 ```
 myMathExpression = 3 + 1 * 2 / 3 - 7

content/pages/docs/kcl-std/functions/std-solid-appearance.md

@@ -1,37 +1,38 @@
 ---
 title: "appearance"
 subtitle: "Function in std::solid"
-excerpt: "Set the appearance of a solid. This only works on solids, not sketches or individual paths."
+excerpt: "Set the appearance of a solid, imported geometry, or plane. This does not work on sketches or individual paths."
 layout: manual
 ---
 
-Set the appearance of a solid. This only works on solids, not sketches or individual paths.
+Set the appearance of a solid, imported geometry, or plane. This does not work on sketches or individual paths.
 
 ```kcl
 appearance(
-  @solids: [Solid; 1+] | ImportedGeometry,
+  @solids: [Solid; 1+] | ImportedGeometry | Plane,
   color: string,
   metalness?: number(_),
   roughness?: number(_),
   opacity?: number(_),
-): [Solid; 1+] | ImportedGeometry
+): [Solid; 1+] | ImportedGeometry | Plane
 ```
 
 This will work on any solid, including extruded solids, revolved solids, and shelled solids.
+For planes, only `color` is used.
 
 ### Arguments
 
 | Name | Type | Description | Required |
 |----------|------|-------------|----------|
-| `solids` | [[`Solid`](/docs/kcl-std/types/std-types-Solid); 1+] or [`ImportedGeometry`](/docs/kcl-std/types/std-types-ImportedGeometry) | The The solid(s) whose appearance is being set. | Yes |
+| `solids` | [[`Solid`](/docs/kcl-std/types/std-types-Solid); 1+] or [`ImportedGeometry`](/docs/kcl-std/types/std-types-ImportedGeometry) or [`Plane`](/docs/kcl-std/types/std-types-Plane) | The solid(s), imported geometry, or plane whose appearance is being set. | Yes |
 | `color` | [`string`](/docs/kcl-std/types/std-types-string) | Color of the new material, a hex string like '#ff0000'. | Yes |
 | `metalness` | [`number(_)`](/docs/kcl-std/types/std-types-number) | Metalness of the new material, a percentage like 95.7. | No |
 | `roughness` | [`number(_)`](/docs/kcl-std/types/std-types-number) | Roughness of the new material, a percentage like 95.7. | No |
 | `opacity` | [`number(_)`](/docs/kcl-std/types/std-types-number) | Opacity. Defaults to 100 (totally opaque). 0 would be totally transparent. | No |
 
 ### Returns
 
-[[`Solid`](/docs/kcl-std/types/std-types-Solid); 1+] or [`ImportedGeometry`](/docs/kcl-std/types/std-types-ImportedGeometry)
+[[`Solid`](/docs/kcl-std/types/std-types-Solid); 1+] or [`ImportedGeometry`](/docs/kcl-std/types/std-types-ImportedGeometry) or [`Plane`](/docs/kcl-std/types/std-types-Plane)
 
 
 ### Examples
@@ -348,4 +349,24 @@ cube
 >
 </model-viewer>
 
+```kcl
+offsetPlane(XZ, offset = 4mm)
+  |> appearance(color = "#ff0000", opacity = 50)
+
+```
+
+
+<model-viewer
+  class="kcl-example"
+  alt="Example showing a rendered KCL program that uses the appearance function"
+  src="/kcl-test-outputs/models/serial_test_example_fn_std-solid-appearance10_output.gltf"
+  ar
+  environment-image="/moon_1k.hdr"
+  poster="/kcl-test-outputs/serial_test_example_fn_std-solid-appearance10.png"
+  shadow-intensity="1"
+  camera-controls
+  touch-action="pan-y"
+>
+</model-viewer>
+