earth.yaml

layers:
    earth:
        data: { source: mapzen }
        draw:
            polygons:
                order: global.order
                color: [0.267,0.365,0.502]
        early:
            filter: { $zoom: { max: 7 } }
            draw:
                polygons:
                    style: earth-early
        later:
            filter: { $zoom: { min: 7 } }
            draw:
                polygons:
                    style: polygons
                    color: [[7,[0.242,0.332,0.456]],[8,[0.212,0.302,0.431]]]

styles:
    earth-early:
        base: polygons
        mix: [functions-zoom, polygons-diagonal-opaque-stripes]
        shaders:
            defines:
                ZOOM_START: 0.
                ZOOM_END: 6.5
                ZOOM_MAX: 6.

                STRIPES_ALPHA: 1.
                STRIPES_SCALE: mix(25.,50.,smoothstep(0.,1.,1.-zoom()))
                STRIPES_WIDTH: 1.-zoom()-.2