diff --git a/src/Add-on/ExplosionMap.ts b/src/Add-on/ExplosionMap.ts
index 820b551a6..d651c9fa8 100644
--- a/src/Add-on/ExplosionMap.ts
+++ b/src/Add-on/ExplosionMap.ts
@@ -5,7 +5,7 @@ import { Vector3, Object3D } from "three";
 import { Board } from "../DatabaseServices/Board";
 import { PromptStatus } from "../Editor/PromptResult";
 
-const MOVEDIS = 0.02;
+const MOVEDIS = 10;
 const MOVECOUNT = 70;
 const STOPCOUNT = MOVECOUNT * 2 + 1;
 
@@ -42,6 +42,7 @@ export class Command_ExplosionMap implements Command
         if (brs.Status !== PromptStatus.OK) return;
 
         let box = GetBoxArr(brs.SelectSet.SelectObjectList);
+        let size = box.getSize(new Vector3());
         let cen = box.getCenter(new Vector3());
         for (let obj of brs.SelectSet.SelectObjectList)
         {
@@ -49,12 +50,8 @@ export class Command_ExplosionMap implements Command
             {
                 let objCen = GetBox(obj).getCenter(new Vector3());
                 let v = objCen.clone().sub(cen);
-                let zv = obj.userData.Entity.Normal as Vector3;
-                if (zv instanceof Vector3)
-                {
-                    let d = zv.dot(v);
-                    this.moveObjs.push([obj, zv.clone().multiplyScalar(d)]);
-                }
+                v.divide(size);
+                this.moveObjs.push([obj, v]);
             }
         }