diff --git a/packages/viewer/src/index.ts b/packages/viewer/src/index.ts
index c3ad4038b..16a4e31f6 100644
--- a/packages/viewer/src/index.ts
+++ b/packages/viewer/src/index.ts
@@ -183,6 +183,7 @@ import {
   ObjectPickConfiguration,
   DefaultObjectPickConfiguration
 } from './modules/SpeckleRenderer.js'
+import { ChunkArray, VirtualArray } from './modules/converter/VirtualArray.js'
 export {
   Viewer,
   LegacyViewer,
@@ -305,7 +306,9 @@ export {
   SpeckleMesh,
   SpeckleInstancedMesh,
   CameraControllerOptions,
-  NearPlaneCalculation
+  NearPlaneCalculation,
+  ChunkArray,
+  VirtualArray
 }
 
 export type {
diff --git a/packages/viewer/src/modules/converter/Geometry.ts b/packages/viewer/src/modules/converter/Geometry.ts
index b2d16f464..09f396f0b 100644
--- a/packages/viewer/src/modules/converter/Geometry.ts
+++ b/packages/viewer/src/modules/converter/Geometry.ts
@@ -29,8 +29,6 @@ export enum GeometryAttributes {
   INDEX = 'INDEX'
 }
 
-type AttributeValue = ChunkArray
-
 // Required keys
 type RequiredKeys = GeometryAttributes.POSITION | GeometryAttributes.INDEX
 
@@ -39,9 +37,9 @@ type OptionalKeys = Exclude<GeometryAttributes, RequiredKeys>
 
 // Final shape: required + optional keys
 type GeometryAttributesShape = {
-  [K in RequiredKeys]: AttributeValue
+  [K in RequiredKeys]: ChunkArray
 } & {
-  [K in OptionalKeys]?: AttributeValue
+  [K in OptionalKeys]?: ChunkArray
 }
 
 export interface GeometryData {
@@ -94,7 +92,7 @@ export class Geometry {
   }
 
   static mergeGeometryAttribute(
-    attributes: AttributeValue[],
+    attributes: ChunkArray[],
     target: Float32Array | Float64Array
   ): ArrayLike<number> {
     let offset = 0
@@ -110,8 +108,8 @@ export class Geometry {
   }
 
   static mergeIndexAttribute(
-    indexAttributes: AttributeValue[],
-    positionAttributes: AttributeValue[]
+    indexAttributes: ChunkArray[],
+    positionAttributes: ChunkArray[]
   ): number[] {
     let indexOffset = 0
     const mergedIndex = []
diff --git a/packages/viewer/src/modules/loaders/OBJ/ObjGeometryConverter.ts b/packages/viewer/src/modules/loaders/OBJ/ObjGeometryConverter.ts
index 233b19de6..ce2d457e9 100644
--- a/packages/viewer/src/modules/loaders/OBJ/ObjGeometryConverter.ts
+++ b/packages/viewer/src/modules/loaders/OBJ/ObjGeometryConverter.ts
@@ -1,5 +1,5 @@
-import { Matrix4 } from 'three'
-import { type NodeData } from '../../../index.js'
+import { MathUtils, Matrix4 } from 'three'
+import { ChunkArray, type NodeData } from '../../../index.js'
 import { type GeometryData } from '../../converter/Geometry.js'
 import { GeometryConverter, SpeckleType } from '../GeometryConverter.js'
 import { mergeVertices } from 'three/examples/jsm/utils/BufferGeometryUtils.js'
@@ -64,13 +64,30 @@ export class ObjGeometryConverter extends GeometryConverter {
     if (!node.raw.geometry.index || node.raw.geometry.index.array.length === 0) {
       node.raw.geometry = mergeVertices(node.raw.geometry)
     }
-
     return {
       attributes: {
-        POSITION: Array.from(node.raw.geometry.attributes.position.array),
-        INDEX: Array.from(node.raw.geometry.index.array),
+        POSITION: new ChunkArray([
+          {
+            data: node.raw.geometry.attributes.position.array,
+            id: MathUtils.generateUUID(),
+            references: 1
+          }
+        ]),
+        INDEX: new ChunkArray([
+          {
+            data: node.raw.geometry.index.array,
+            id: MathUtils.generateUUID(),
+            references: 1
+          }
+        ]),
         ...(node.raw.geometry.attributes.color && {
-          COLOR: Array.from(node.raw.geometry.attributes.color.array)
+          COLOR: new ChunkArray([
+            {
+              data: node.raw.geometry.attributes.color.array,
+              id: MathUtils.generateUUID(),
+              references: 1
+            }
+          ])
         })
       },
       bakeTransform: new Matrix4().makeScale(
@@ -79,6 +96,6 @@ export class ObjGeometryConverter extends GeometryConverter {
         conversionFactor
       ),
       transform: null
-    } as GeometryData
+    } satisfies GeometryData
   }
 }