Last's years annual may be of interest as a starting point. It contained two issues dedicated to graveyards and crypts.

This is a dungeon style though, but if you are going to a zoom level where you can actually see such details, you kind of end up there. For larger scales, city, and especially overland, such details tend to disappear.

As far as I know, there aren't any necropolis styles for overland or city, but perhaps some of the darker styles may be appropriate to provide the right mood, like Darklands and Darklands City.

Please remember to mark them in the terrain as you pass though them for the benefit of future travelers.

The error stems from that map not having a background color.

This might immediately sound a bit weird, but in CC3+, a bacground color is associated with an actual entity on the BACKGROUND layer, while the color you see in the map isn't the background color, but the view window color. One way you can see a difference between the two is that a background color is only behind your map, while if there is a different view-window color, you'll see it behind the symbols in the symbol catalog window as well.

In short, you don't want to use the Change Background color on that map. You'll want to use change properties to change the color of the coastline, and View -> View-Window Color to change that dark "background" color.

Let us have a look what hides beneath the surface of our neighbor, shall we?

As always, you can see the time in your timezone in the left sidebar. You can visit the stream over at YouTube if you wish to participate in the chat.

The rotation commands allow you to type in the exact amount on the command line. I recommend the non-visual rotate for these operations, which you find by right-clicking :CC2ROTATE:.