Feature: Elevation Shadows for user

[Kharmans]

So, I have players who have a potato computer and if the Elevation Shadow is setting to WebGL, the computer just froze. So, this feature is too cool for me to just change the entiry experience of other players (and mine) to just change for None or Polygons.

Would be good if this option could be setting for user and not only globally. In this case, the potato computers just change that to None and the others leave to WebGL!