diff --git a/src/views/bigScreen/cesiumtest.vue b/src/views/bigScreen/cesiumtest.vue
index 7550eeee..2fa682b1 100644
--- a/src/views/bigScreen/cesiumtest.vue
+++ b/src/views/bigScreen/cesiumtest.vue
@@ -403,6 +403,10 @@ export default {
 			navigationInstructionsInitiallyVisible: false,
 		});
 		this.viewer = viewer;
+		// 关闭时间对模型明暗的影响
+		viewer.scene.light = new Cesium.DirectionalLight({ 
+  direction: new Cesium.Cartesian3(0.354925, -0.890918, -0.283358)
+})
 		if (Cesium.FeatureDetection.supportsImageRenderingPixelated()) {
 			//判断是否支持图像渲染像素化处理
 			viewer.resolutionScale = window.devicePixelRatio;