diff --git a/api/graphics3d/Scene.d.ts b/api/graphics3d/Scene.d.ts
index 838408be3a469c17e0c30952d9764a067d7ef6f9..8b795356fb5fcec29449789ea2cb5b2a6005d391 100644
--- a/api/graphics3d/Scene.d.ts
+++ b/api/graphics3d/Scene.d.ts
@@ -375,31 +375,44 @@ export declare class Scene {
   /**
    * The environment of the scene.
    *
-   * @type { Environment }
+   * @return { Environment }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts {'1.1':'12', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  environment: Environment;
+  get environment(): Environment;
+
+  /**
+   * The environment of the scene.
+   *
+   * @param { Environment } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since arkts {'1.1':'12', '1.2':'20'}
+   * @arkts 1.1&1.2
+   */
+  set environment(value: Environment);
   
   /**
    * The animations of the scene.
    *
-   * @type { Animation[] }
+   * @return { Animation[] }
    * @readonly
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts {'1.1':'12', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  readonly animations: Animation[];
+  get animations(): Animation[];
  
   /**
    * The root node of the scene.
    *
-   * @type { Node | null }
+   * @return { Node | null }
    * @readonly
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts {'1.1':'12', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  readonly root: Node | null;
+  get root(): Node | null;
  
   /**
    * Get a node by path.
diff --git a/api/graphics3d/SceneTypes.d.ts b/api/graphics3d/SceneTypes.d.ts
index 81a38d97f6b51220cc4f9b98aac21595e5355397..59ead8111f6dc86085940cf65f087625f2f7209e 100644
--- a/api/graphics3d/SceneTypes.d.ts
+++ b/api/graphics3d/SceneTypes.d.ts
@@ -16,7 +16,6 @@
 /**
  * @file Defines 3D basic types
  * @kit ArkGraphics3D
- * @arkts 1.1&1.2
  */
 
 /**
@@ -24,7 +23,8 @@
  *
  * @typedef Vec2
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export interface Vec2 {
   /**
@@ -32,7 +32,8 @@ export interface Vec2 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   x: double;
 
@@ -41,7 +42,8 @@ export interface Vec2 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   y: double;
 }
@@ -51,7 +53,8 @@ export interface Vec2 {
  *
  * @typedef Vec3
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export interface Vec3 {
   /**
@@ -59,7 +62,8 @@ export interface Vec3 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   x: double;
 
@@ -68,7 +72,8 @@ export interface Vec3 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   y: double;
 
@@ -77,7 +82,8 @@ export interface Vec3 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   z: double;
 }
@@ -87,7 +93,8 @@ export interface Vec3 {
  *
  * @typedef Vec4
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export interface Vec4 {
   /**
@@ -95,7 +102,8 @@ export interface Vec4 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   x: double;
 
@@ -104,7 +112,8 @@ export interface Vec4 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   y: double;
 
@@ -113,7 +122,8 @@ export interface Vec4 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   z: double;
 
@@ -122,7 +132,8 @@ export interface Vec4 {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   w: double;
 }
@@ -132,7 +143,8 @@ export interface Vec4 {
  *
  * @typedef Quaternion
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export interface Quaternion {
   /**
@@ -140,7 +152,8 @@ export interface Quaternion {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   x: double;
 
@@ -149,7 +162,8 @@ export interface Quaternion {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   y: double;
 
@@ -158,7 +172,8 @@ export interface Quaternion {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   z: double;
 
@@ -167,7 +182,8 @@ export interface Quaternion {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   w: double;
 }
@@ -177,7 +193,8 @@ export interface Quaternion {
  *
  * @typedef Aabb 
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export interface Aabb {
   /**
@@ -185,7 +202,8 @@ export interface Aabb {
    *
    * @type { Vec3 }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   aabbMin: Vec3;
 
@@ -194,7 +212,8 @@ export interface Aabb {
    *
    * @type { Vec3 }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   aabbMax: Vec3;
 }
@@ -204,7 +223,8 @@ export interface Aabb {
  *
  * @typedef Color 
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export interface Color {
   /**
@@ -212,7 +232,8 @@ export interface Color {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   r: double;
 
@@ -221,7 +242,8 @@ export interface Color {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   g: double;
 
@@ -230,7 +252,8 @@ export interface Color {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   b: double;
 
@@ -239,7 +262,8 @@ export interface Color {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   a: double;
 }
@@ -249,7 +273,8 @@ export interface Color {
  *
  * @typedef Rect
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export interface Rect {
   /**
@@ -257,7 +282,8 @@ export interface Rect {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   x: double;
 
@@ -266,7 +292,8 @@ export interface Rect {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   y: double;
 
@@ -275,7 +302,8 @@ export interface Rect {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   width: double;
 
@@ -284,7 +312,8 @@ export interface Rect {
    *
    * @type { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 12
+   * @since arkts { '1.1':'12', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   height: double;
 }
@@ -294,14 +323,16 @@ export interface Rect {
  * 
  * @enum { int }
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 18
+ * @since arkts { '1.1':'18', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export enum GeometryType {
   /**
    * A custom geometric shape.
    * 
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts { '1.1':'18', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   CUSTOM = 0,
 
@@ -309,7 +340,8 @@ export enum GeometryType {
    * A cube.
    * 
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts { '1.1':'18', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   CUBE = 1,
 
@@ -317,7 +349,8 @@ export enum GeometryType {
    * A plane.
    * 
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts { '1.1':'18', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   PLANE = 2,
 
@@ -325,7 +358,8 @@ export enum GeometryType {
    * A sphere.
    *
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts { '1.1':'18', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   SPHERE = 3
 }
@@ -334,7 +368,8 @@ export enum GeometryType {
  * Define a geometric shape for mesh creation.
  * 
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 18
+ * @since arkts { '1.1':'18', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export declare abstract class GeometryDefinition {
   /**
@@ -343,7 +378,8 @@ export declare abstract class GeometryDefinition {
    * @type { GeometryType }
    * @readonly
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts { '1.1':'18', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   readonly geometryType: GeometryType;
 }
@@ -353,14 +389,16 @@ export declare abstract class GeometryDefinition {
  * 
  * @enum { int }
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 18 
+ * @since arkts { '1.1':'18', '1.2':'20' }
+ * @arkts 1.1&1.2 
  */
 export enum PrimitiveTopology {
   /**
    * The vertices form a set of independent triangle. Vertices (0, 1, 2), (3, 4, 5), ... define separate triangles.
    * 
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts { '1.1':'18', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   TRIANGLE_LIST = 0,
 
@@ -368,7 +406,8 @@ export enum PrimitiveTopology {
    * The vertices form a triangle strip. Starting from the 3rd, each vertex defines a triangle with the previous two.
    * 
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts { '1.1':'18', '1.2':'20' }
+   * @arkts 1.1&1.2
    */
   TRIANGLE_STRIP = 1
 }
@@ -378,7 +417,8 @@ export enum PrimitiveTopology {
  * 
  * @extends GeometryDefinition
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 18
+ * @since arkts { '1.1':'18', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export declare class CustomGeometry extends GeometryDefinition {
   /**
@@ -391,14 +431,47 @@ export declare class CustomGeometry extends GeometryDefinition {
    */
   topology?: PrimitiveTopology;
 
+  /**
+   * How to form mesh triangles from the indexed vertices.
+   * 
+   * @return { PrimitiveTopology | undefined }
+   * @default PrimitiveTopology.TRIANGLE_LIST
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  get topology(): PrimitiveTopology | undefined;
+
+  /**
+   * How to form mesh triangles from the indexed vertices.
+   * 
+   * @param { PrimitiveTopology | undefined } value
+   * @default PrimitiveTopology.TRIANGLE_LIST
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  set topology(value: PrimitiveTopology | undefined);
+
   /**
    * An array of vertices.
    * 
-   * @type { Vec3[] }
+   * @return { Vec3[] }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
+   */
+  get vertices(): Vec3[];
+
+  /**
+   * An array of vertices.
+   * 
+   * @param { Vec3[] } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  vertices: Vec3[];
+  set vertices(value: Vec3[]);
 
   /**
    * Indices of those vertices that form triangles. PrimitiveTopology is applied to the sequence defined by indices.
@@ -419,6 +492,46 @@ export declare class CustomGeometry extends GeometryDefinition {
    */
   indices?: int[];
 
+  /**
+   * Indices of those vertices that form triangles. PrimitiveTopology is applied to the sequence defined by indices.
+   * 
+   * An example of creating an identical pair of triangles, given vertices = [a, b, c, d]:
+   *     topology = PrimitiveTopology.TRIANGLE_LIST
+   *     indices = [0, 1, 2, 2, 1, 3]    
+   *     resulting triangles: abc, cbd
+   * 
+   *     topology = PrimitiveTopology.TRIANGLE_STRIP
+   *     indices = [0, 1, 2, 3]
+   *     resulting triangles: abc, cbd (b and c are reversed in cbd, to match the face direction of the first triangle)
+   * 
+   * @return { int[] | undefined }
+   * @default indices: [0, 1 ,2,..., vertices.size() - 1]
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  get indices(): int[] | undefined;
+
+  /**
+   * Indices of those vertices that form triangles. PrimitiveTopology is applied to the sequence defined by indices.
+   * 
+   * An example of creating an identical pair of triangles, given vertices = [a, b, c, d]:
+   *     topology = PrimitiveTopology.TRIANGLE_LIST
+   *     indices = [0, 1, 2, 2, 1, 3]    
+   *     resulting triangles: abc, cbd
+   * 
+   *     topology = PrimitiveTopology.TRIANGLE_STRIP
+   *     indices = [0, 1, 2, 3]
+   *     resulting triangles: abc, cbd (b and c are reversed in cbd, to match the face direction of the first triangle)
+   * 
+   * @param { int[] | undefined } value
+   * @default indices: [0, 1 ,2,..., vertices.size() - 1]
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  set indices(value: int[] | undefined);
+
   /**
    * Vertex normal. If normals is not null. normals[N] is for vertices[N] and generateNormals is ignored.
    * 
@@ -428,6 +541,26 @@ export declare class CustomGeometry extends GeometryDefinition {
    */
   normals?: Vec3[];
 
+  /**
+   * Vertex normal. If normals is not null. normals[N] is for vertices[N] and generateNormals is ignored.
+   * 
+   * @return { Vec3[] | undefined }
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  get normals(): Vec3[] | undefined;
+
+  /**
+   * Vertex normal. If normals is not null. normals[N] is for vertices[N] and generateNormals is ignored.
+   * 
+   * @param { Vec3[] | undefined } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  set normals(value: Vec3[] | undefined);
+
   /**
    * Vertex texture mapping UV coordinate. If uvs is not null, uvs[N] is for vertices[N]
    * 
@@ -437,6 +570,26 @@ export declare class CustomGeometry extends GeometryDefinition {
    */
   uvs?: Vec2[];
 
+  /**
+   * Vertex texture mapping UV coordinate. If uvs is not null, uvs[N] is for vertices[N]
+   * 
+   * @return { Vec2[] | undefined }
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  get uvs(): Vec2[] | undefined;
+
+  /**
+   * Vertex texture mapping UV coordinate. If uvs is not null, uvs[N] is for vertices[N]
+   * 
+   * @param { Vec2[] | undefined } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  set uvs(value: Vec2[] | undefined);
+
   /**
    * Vertex color. If colors is not null, colors[N] is for vertices[N].
    * 
@@ -445,6 +598,26 @@ export declare class CustomGeometry extends GeometryDefinition {
    * @since 18
    */
   colors?: Color[];
+
+  /**
+   * Vertex color. If colors is not null, colors[N] is for vertices[N].
+   * 
+   * @return { Color[] | undefined }
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  get colors(): Color[] | undefined;
+
+  /**
+   * Vertex color. If colors is not null, colors[N] is for vertices[N].
+   * 
+   * @param { Color[] | undefined } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since 20
+   * @arkts 1.2
+   */
+  set colors(value: Color[] | undefined);
 }
 
 /**
@@ -452,17 +625,29 @@ export declare class CustomGeometry extends GeometryDefinition {
  * 
  * @extends GeometryDefinition
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 18
+ * @since arkts { '1.1':'18', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export declare class CubeGeometry extends GeometryDefinition {
   /**
    * The width, height and depth of the cube.
    * 
-   * @type { Vec3 }
+   * @return { Vec3 }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  size: Vec3;
+  get size(): Vec3;
+
+  /**
+   * The width, height and depth of the cube.
+   * 
+   * @param { Vec3 } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
+   */
+  set size(value: Vec3);
 }
 
 /**
@@ -470,17 +655,29 @@ export declare class CubeGeometry extends GeometryDefinition {
  * 
  * @extends GeometryDefinition
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 18
+ * @since arkts { '1.1':'18', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export declare class PlaneGeometry extends GeometryDefinition {
   /**
    * The width and length of the plane.
    * 
-   * @type { Vec2 }
+   * @return { Vec2 }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  size: Vec2;
+  get size(): Vec2;
+
+  /**
+   * The width and length of the plane.
+   * 
+   * @param { Vec2 } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
+   */
+  set size(value: Vec2);
 }
 
 /**
@@ -488,33 +685,57 @@ export declare class PlaneGeometry extends GeometryDefinition {
  * 
  * @extends GeometryDefinition
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 18
+ * @since arkts { '1.1':'18', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export declare class SphereGeometry extends GeometryDefinition {
   /**
    * The raduis of the sphere.
    * 
-   * @type { double }
+   * @return { double }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  radius: double;
+  get radius(): double;
+
+  /**
+   * The raduis of the sphere.
+   * 
+   * @param { double } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
+   */
+  set radius(value: double);
 
   /**
    * Divide the sphere latitudinally into this many circles and each circle longitudinally into this mant segments.
    * 
-   * @type { int }
+   * @return { int }
    * @syscap SystemCapability.ArkUi.Graphics3D
-   * @since 18
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
    */
-  segmentCount: int;
+  get segmentCount(): int;
+
+  /**
+   * Divide the sphere latitudinally into this many circles and each circle longitudinally into this mant segments.
+   * 
+   * @param { int } value
+   * @syscap SystemCapability.ArkUi.Graphics3D
+   * @since arkts {'1.1':'18', '1.2':'20'}
+   * @arkts 1.1&1.2
+   */
+  set segmentCount(value: int);
 }
 /**
  * 3D position information.
  *
  * @typedef { Vec3 } 
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export type Position3 = Vec3;
 
@@ -523,7 +744,8 @@ export type Position3 = Vec3;
  *
  * @typedef { Vec3 } 
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export type Rotation3 = Vec3;
 
@@ -532,6 +754,7 @@ export type Rotation3 = Vec3;
  *
  * @typedef { Vec3 } 
  * @syscap SystemCapability.ArkUi.Graphics3D
- * @since 12
+ * @since arkts { '1.1':'12', '1.2':'20' }
+ * @arkts 1.1&1.2
  */
 export type Scale3 = Vec3;