一開始問怎么實現(xiàn)陰影，后面又問怎么取消陰影，完全看不懂你想做什么。
既然這樣就只有給你個配置文檔自己看了： http://echarts.baidu.com/opti...

附上我以前實現(xiàn)這類地圖的options參考吧：

{
      geo3D: {
        map: 'Sicuan',
        shading: 'lambert',
        realisticMaterial: {
          roughness: 0.2,
          metalness: 0,
        },
        postEffect: {
          enable: true,
          SSAO: {
            enable: true,
            radius: 2,
            intensity: 1,
          },
        },
        groundPlane: {
          show: false,
        },
        light: {
          main: {
            intensity: 1,
            shadow: true,
            shadowQuality: 'medium',
            alpha: 30,
          },
          ambient: {
            intensity: 1,
          },
        },

        viewControl: {
          distance: 135,
          minDistance: 110,
          maxDistance: 180,
          alpha: 50,
          minAlpha: 30,
          beta: 75,
        },
        
        ...
}