3D line symbols are translated to a LineSymbol3DLayer or PathSymbol3DLayer in the web scene. PathSymbol3DLayer supports height and width in meters, and to ensure a line symbol is translated properly, you must enable real-world units in the layer properties of the polyline layer.
Enable real-world units.
- In the Contents pane, right-click the polyline layer and click Properties.
- On the Layer Properties dialog box, on the Display tab, check Display 3D symbols in real-world units to enable real-world units for the layer.
- Click OK.
If you do not enable this property, line symbols will be flattened or change in size when you share the web scene.