diff --git a/types/three/src/objects/BatchedMesh.d.ts b/types/three/src/objects/BatchedMesh.d.ts
index 2669b5c08..326479a2d 100644
--- a/types/three/src/objects/BatchedMesh.d.ts
+++ b/types/three/src/objects/BatchedMesh.d.ts
@@ -141,6 +141,12 @@ declare class BatchedMesh extends Mesh<BufferGeometry, Material> {
      */
     getVisibleAt(instanceId: number): boolean;
 
+    /**
+     * Get the geometryIndex of the defined instance.
+     * @param instanceId The id of an instance to get the geometryIndex of.
+     */
+    getGeometryIdAt(instanceId: number): number;
+
     /**
      * Sets the given color to the defined geometry instance.
      * @param instanceId The id of the instance to set the color of.
@@ -162,6 +168,13 @@ declare class BatchedMesh extends Mesh<BufferGeometry, Material> {
      */
     setVisibleAt(instanceId: number, visible: boolean): this;
 
+    /**
+     * Sets the geometryIndex of the instance at the given index.
+     * @param instanceId The id of the instance to set the geometryIndex of.
+     * @param geometryId The geometryIndex to be use by the instance.
+     */
+    setGeometryIdAt(instanceId: number, geometryId: number): this;
+
     /**
      * Adds the given geometry to the {@link BatchedMesh} and returns the associated index referring to it.
      * @param geometry The geometry to add into the {@link BatchedMesh}.