diff --git a/src/Add-on/DrawSky.ts b/src/Add-on/DrawSky.ts
index a423cfe64..01a6ac9f9 100644
--- a/src/Add-on/DrawSky.ts
+++ b/src/Add-on/DrawSky.ts
@@ -17,24 +17,4 @@ export class DrawSky implements Command
         mat.uniforms.sub
         window["sky"] = sky;
     }
-    async exec2()
-    {
-        let vertexShader = require("../glsl/sky.vs");
-        let fragmentShader = require("../glsl/sky.fs");
-
-        var uniforms = {
-            topColor: { value: new THREE.Color(0x0077ff) },
-            bottomColor: { value: new THREE.Color(0xffffff) },
-            offset: { value: 33 },
-            exponent: { value: 0.6 }
-        };
-        uniforms.topColor.value.copy(new THREE.Color(0.6, 1, 0.6));
-
-
-        var skyGeo = new THREE.SphereGeometry(40, 32, 15);
-        var skyMat = new THREE.ShaderMaterial({ vertexShader: vertexShader, fragmentShader: fragmentShader, uniforms: uniforms, side: THREE.BackSide });
-
-        var sky = new THREE.Mesh(skyGeo, skyMat);
-        app.m_Viewer.m_Scene.add(sky);
-    }
 }
\ No newline at end of file