diff --git a/src/Editor/DefaultConfig.ts b/src/Editor/DefaultConfig.ts
index 86c0d5f52..5b5696315 100644
--- a/src/Editor/DefaultConfig.ts
+++ b/src/Editor/DefaultConfig.ts
@@ -265,7 +265,7 @@ export const DefaultRectAreaLightOption: RectAreaLightOption = {
 Object.freeze(DefaultRectAreaLightOption);
 
 export const DefaultRightPlaneLightOption: RightPlaneLightOption = {
-    version: 2,
+    version: 3,
     ShowHemiLight: true,
     ShowSunLight: true,
     SkyLightColor: "#FFFFFF",
@@ -277,6 +277,7 @@ export const DefaultRightPlaneLightOption: RightPlaneLightOption = {
     SunLightTemperature: 6500,
     SunLightElevationDeg: 60,
     SunLightRotateDeg: 300,
+    SunLightSourceAngle: 0.5,
     ShowExposure: true,
     AutoExposure: false,
     ExposureCompensation: 0,
diff --git a/src/UI/Store/OptionInterface/IOptionInterface.ts b/src/UI/Store/OptionInterface/IOptionInterface.ts
index ec1627864..a28892fb5 100644
--- a/src/UI/Store/OptionInterface/IOptionInterface.ts
+++ b/src/UI/Store/OptionInterface/IOptionInterface.ts
@@ -38,6 +38,7 @@ export interface RightPlaneLightOption
     SunLightTemperature: number;
     SunLightElevationDeg: number;
     SunLightRotateDeg: number;
+    SunLightSourceAngle: number;
     ShowExposure: boolean;
     AutoExposure: boolean;
     ExposureCompensation: number;
diff --git a/src/UI/Store/RightPanelStore/LightStore.ts b/src/UI/Store/RightPanelStore/LightStore.ts
index db0790b57..36aeb6f10 100644
--- a/src/UI/Store/RightPanelStore/LightStore.ts
+++ b/src/UI/Store/RightPanelStore/LightStore.ts
@@ -602,6 +602,7 @@ export class RightPlaneLightStore implements IConfigStore
         this.m_Option.SunLightTemperature = sunLightStore.sunLightColorTemperature;
         this.m_Option.SunLightElevationDeg = sunLightStore.sunLightElevationDeg;
         this.m_Option.SunLightRotateDeg = sunLightStore.sunLightRotateDeg;
+        this.m_Option.SunLightSourceAngle = sunLightStore.sunLightSourceAngle;
         this.m_Option.ShowExposure = lightStore.ShowExposure;
         this.m_Option.AutoExposure = lightStore.hemisphereLightData.AutoExposure;
         this.m_Option.ExposureCompensation = parseInt(lightStore.hemisphereLightData.ExposureCompensation);
@@ -642,6 +643,15 @@ export class RightPlaneLightStore implements IConfigStore
             lightStore.sunLightData.time = cof.option.SunTime as ETime;
         }
 
+        if (this.m_Option.version < 3)
+        {
+            this.m_Option.version = 3;
+            sunLightStore.sunLightSourceAngle = DefaultRightPlaneLightOption.SunLightSourceAngle;
+        }
+        else
+            sunLightStore.sunLightSourceAngle = cof.option.SunLightSourceAngle;
+
+
         let sunLight = app.Database.SunLight;
         let skyLight = app.Database.HemisphereLight;
         let pos: Vector3;
@@ -661,7 +671,7 @@ export class RightPlaneLightStore implements IConfigStore
             sunLight.IndirectLightingIntensity = cof.option.SunLightIndirectLightingIntensity;
             sunLight.Color = new Color(cof.option.SunLightColor);
             sunLight.Temperature = cof.option.SunLightTemperature;
-
+            sunLight.LightSourceAngle = sunLightStore.sunLightSourceAngle;
             sunLight.SunPosition = pos;
 
             CalcSunShadowCameraExtents(app.Database.SunLight, false);