our background to render below the hero.
          render.layerIndex = 1;

          // Add the renderer to the scene.
          render.scene = PBE.scene;

          // Point the render component to this entity's Spatial component for position information
          render.positionProperty = new PropertyReference("@Spatial.position");

          // Add our render component to the BG entity with the name "Render"
          bg.addComponent( render, "Render" );

          // Register the entity with PBE under t