In the older globe maps, you could render a circle filled with a radial gradient behind the globe in order to make it appear as though there was sea around the continents.
This looked great, example here:
https://www.highcharts.com/blog/code-ex ... net-earth/
In the newer version there are some nice additional projections, but you can't just use the same trick of renering a blue globe under the continents as the projections are of various shapes.
https://www.highcharts.com/demo/maps/pr ... n-explorer
Is it possible to still render the sea somehow with a nice blue gradient in order to help make the maps look natural and therefore help with user interpretation of the data?
Waht I'm trying to do is apply a blue sea gradient to this type of chart (whereby each projection retains the sea colouring): https://jsfiddle.net/jjjjssssfidd/th69k8zg/15/