function startUnityLoading() {
      loadingCover.style.display = "";
      createUnityInstance(canvas, config, (progress) => {
        spinner.style.display = "none";
        progressBarEmpty.style.display = "";
        progressBarFull.style.width = `${100 * progress}%`;
      })
        .then((unityInstance) => {
          applicationInstance = unityInstance;
          loadingCover.style.display = "none";

          if (canFullscreen) {
            if (!hideFullScreenButton) {
              fullscreenButton.style.display = "";
            }
            fullscreenButton.onclick = () => {
              unityInstance.SetFullscreen(1);
            };
          }

         // mainContainer.style.display = "";  
          walkButton.style.display = "";
          togglePanning.style.display = "";
          focusButton.style.display = "";
          measurementsButton.style.display = "";

          zoomMinus.style.display = "";
          zoomInfo.style.display = "";
          zoomPlus.style.display = "";

          saveButton.style.display = "";
          loadButton.style.display = "";

          logoutButton.style.display = "";

          inputJsonContainer.style.display = "";

          deselectButton.style.display = "";
          toggleContainer.style.display = "";

          multiSelectButton.style.display = "";
          groupButton.style.display = "";

          multiSelectButton.style.display = "";
          groupButton.style.display = "";
          sidebar.style.display = "";

          inputUrlContainer.style.display = "";
          textureInputUrlContainer.style.display = "";


          setSidebarSize(sidebarState);
          showSizeSelectionDialog();
          startLogin();
        })
        .catch((message) => {
          alert(message);
        });
    }