message: BF Product of null range and transform = max range.
diff: @@ -217,7 +217,9 @@ export class Tile implements IDisposable {
  /** Returns the range of this tile's contents in world coordinates. */
  public computeWorldContentRange(): ElementAlignedBox3d {
  const range = new ElementAlignedBox3d();
  + if (!this.contentRange.isNull)
  this.root.location.multiplyRange(this.contentRange, range);
  +
  return range;
  }
  