message: Opaque buildings
  Buildings are transparent because otherwise the shadow shows through, this can be fixed with some
  bias as shown in the PR: however this introduces z fighting, and the values would need to be
  customized for a specific screen resolution etc.
diff: @@ -231,7 +231,11 @@ export namespace ThreejsShadows {
  },
  castShadow: true
  }
  - ]
  + ],
  + definitions: {
  + // Opaque buildings
  + defaultBuildingColor: "#EDE7E1FF"
  + }
  };
  initializeMapView("mapCanvas", theme);
  }
  