Altitude display

[neocturne]

Feature request: Altitude display

(suggested by @phoenix84pl)

• Add an additional layer for better altitude display
  • We already use the altitude (height of land blocks, depth for water) to modify the map colors
  • Having an additional layer would make the altitude easier to see
  • Maybe a contour map? The line density could scale with the zoom level
• Display altitude in mouse hover box with X/Z coordinates?

[phoenix84pl]

Additional layer is better, but on chunkbase.com they show altitude on the same layer with some graphic tricks (I still preffer additional layer)