This is a Tangram scene, made with Tangram Play. It uses CartoDB data exported as GeoJSON vector tiles.[This is a Tangram scene, made with Tangram Play.]

cartodb.yaml

cameras:
    perspective:
        type: perspective
        vanishing_point: [0, -500]
lights:
    directional1:
        type: directional
        direction: [.1, .5, -1]
        diffuse: .7
        ambient: .5
styles:
    buildings:
        base: polygons
        shaders:
            blocks:
                color: |
                    color.rgb *= vec3(min((worldPosition().z*.001 + .5),1.));

sources:
    osm:
        type: TopoJSON
        url:  //vector.mapzen.com/osm/all/{z}/{x}/{y}.topojson?api_key=vector-tiles-P6dkVl4
    cartodb:
        type: GeoJSON
        url: http://osm2.cartodb.com/api/v2/sql?format=geojson&q=%20WITH%20_sql%20AS%20(SELECT%20*%20FROM%20us_counties),%20zz%20AS%20(SELECT%20{z}%20as%20z,{x}%20as%20x,{y}%20as%20y),%20tile%20AS%20(SELECT%20TileBBox(zz.z,zz.x,zz.y)%20as%20bbox,zz.z%20as%20zoom%20FROM%20zz)%20SELECT%20cartodb_id,%20ST_Transform(ST_Simplify(ST_ClipByBox2D(the_geom_webmercator,%20tile.bbox),%20ZRes(tile.zoom)),4326)%20as%20the_geom%20FROM%20_sql%20INNER%20JOIN%20tile%20ON%20(ST_Intersects(_sql.the_geom_webmercator,%20tile.bbox))%20WHERE%20sqrt(ST_Area(_sql.the_geom_webmercator))%20%3E%20ZRes(tile.zoom)

layers:
    cartodb:
        data: { source: cartodb}
        draw:
            lines:
                order: 100
                color: red
                width: 2px

    water:
        data: { source: osm }
        draw:
            polygons:
                order: 2
                color: '#353535'
    earth:
        data: { source: osm }
        draw:
            polygons:
                order: 0
                color: '#555'
    landuse:
        data: { source: osm }
        draw:
            polygons:
                order: 1
                color: '#666'
    roads:
        data: { source: osm }
        properties: { width: 3 }
        draw:
            lines:
                order: 2
                color: '#777'
                width: 5
        ferry:
            filter: { kind: ferry }
            draw:
                lines:
                    order: 2
                    color: '#444'
                    width: 2
    buildings:
        data: { source: osm }
        draw:
            polygons:
                order: 50
                color: '#999'
        extruded:
            draw:
                polygons:
                    style: buildings
                    extrude: function () { return feature.height > 0 || $zoom >= 16; }
    road_labels:
        data: { source: osm, layer: roads }
        filter: { name: true, aeroway: false, tunnel: false, railway: false, not: { kind: [rail, ferry] } }

        highway:
            filter: { kind: highway, $zoom: { min: 7 } }
            draw:
                text:
                    font:
                        fill: white
                        family: helvetica
                        size: 12px
                        weight: 500
        not_highway:
            filter: { not: { kind: highway }, $zoom: { min: 13 } }
            draw:
                text:
                    font:
                        fill: white
                        family: helvetica
                        size: 11px
                        weight: 100