diff --git a/src/Obj/Base/TrajectoryMotion/index.js b/src/Obj/Base/TrajectoryMotion/index.js
index aefb9dc..7256780 100644
--- a/src/Obj/Base/TrajectoryMotion/index.js
+++ b/src/Obj/Base/TrajectoryMotion/index.js
@@ -1764,9 +1764,10 @@ class TrajectoryMotion extends Base {
         if (!cartesian3) {
           return
         }
-        coordinates = _this.cartesian3Towgs84(cartesian3, viewer);
+        let pos84 = _this.cartesian3Towgs84(cartesian3, viewer);
+        coordinates = [pos84.lng, pos84.lat, pos84.alt + 1.8]
         position = cartesian3
-        positionCamera = Cesium.Cartesian3.fromDegrees(coordinates.lng, coordinates.lat, coordinates.alt + 1.8)
+        positionCamera = Cesium.Cartesian3.fromDegrees(coordinates[0], coordinates[1], coordinates[2])
         let positions_smooth = []
         for (let i = 0; i <= 1000; i++) {
           if ((i / 1000) > (distance / _this.distance)) {
@@ -1890,7 +1891,7 @@ class TrajectoryMotion extends Base {
           else {
             if (_this.sdk.viewer.trackedEntity) {
               _this.sdk.viewer.camera.setView({
-                destination: Cesium.Cartesian3.fromDegrees(coordinates.lng, coordinates.lat, _this.sdk.viewer.camera.positionCartographic.height),
+                destination: Cesium.Cartesian3.fromDegrees(coordinates[0], coordinates[1], _this.sdk.viewer.camera.positionCartographic.height),
                 orientation: {
                   heading: Cesium.Math.toRadians(-90),
                   pitch: 0,
diff --git a/src/YJEarth/index.js b/src/YJEarth/index.js
index 775f153..b959df3 100644
--- a/src/YJEarth/index.js
+++ b/src/YJEarth/index.js
@@ -151,7 +151,7 @@ class YJEarth {
     }
     this.options.contextOptions = {
       webgl: {
-        alpha: true,
+        // alpha: true,
         depth: true,
         stencil: true,
         antialias: true,