remove meshbuilder

Viewer/package.json

@@ -39,8 +39,6 @@
         "webpack-dev-server": "^3.1.4"
     },
     "dependencies": {
-        "@babylonjs/core": "^4.0.0-alpha.18",
-        "@babylonjs/loaders": "^4.0.0-alpha.18",
         "pepjs": "^0.4.3"
     }
 }

Viewer/src/renderOnlyIndex.ts

@@ -4,7 +4,8 @@ import { RenderOnlyViewer } from './viewer/renderOnlyViewer';
 import '@babylonjs/loaders/glTF/2.0';
 import "@babylonjs/core/Lights/Shadows/shadowGeneratorSceneComponent"
 import "@babylonjs/core/Debug/debugLayer";
-import "@babylonjs/core/Meshes/meshBuilder";
+import "@babylonjs/core/Meshes/Builders/planeBuilder";
+import "@babylonjs/core/Meshes/Builders/boxBuilder";
 import "@babylonjs/core/Materials/Textures/Loaders/ddsTextureLoader"
 import "@babylonjs/core/Materials/Textures/Loaders/envTextureLoader"
 import "@babylonjs/core/Materials/Textures/Loaders/ktxTextureLoader"