Update viewer.js

viewer.js

@@ -240,14 +240,10 @@ export async function initializeViewer(config, instanceId) {
       const bgPlane = new pc.Entity("Plane");
       bgPlane.addComponent("model", { type: "plane" });
       bgPlane.setLocalPosition(0, 0.1, 0);
-      const mat = new pc.StandardMaterial();
-      mat.diffuse = new pc.Color(1, 1, 1);
-      mat.emissive = new pc.Color(1, 1, 1);
-      mat.emissiveMap = grilleTex;
-      mat.emissiveIntensity = 1;
-      mat.useLighting = false;
+      bgPlane.setLocalScale(1, 1, 1);
+      
       mat.update();
-      bgPlane.model.material = mat;
+      bgPlane.model.material = matSol;
       app.root.addChild(bgPlane);
 
       traverse(presentoirEntity, node => {