Improve coal visibility on map

[terror_gnom]

Hi,

I find it rather hard to spot coal patches on the map when they have a dark terrain background texture.

Would it be possible to add a "hide terrain" button so all land will be just gras-green water just blue and the rest like it is? When implementing it, it would be nice if you could add a checkbox to select any resource type to highlight.

[ssilk]

Added to viewtopic.php?f=80&t=22760 Support for Color Blinds / Better Visibility ...