原本有一个变亮的属性luminanceAtZenith，但是新版本的cesium没有这个属性了。于是

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 let lightColor = '3.0'result._customShader = new this.ffCesium.Cesium.CustomShader({fragmentShaderText:`void fragmentMain(FragmentInput fsInput, inout czm_modelMaterial material) {material.diffuse = material.diffuse * ` +lightColor +`;}`})