diff --git a/Client/Assets/Game/shader/XShader/XPbr_Base.hlsl b/Client/Assets/Game/shader/XShader/XPbr_Base.hlsl
index 23592b91..1bd6adac 100644
--- a/Client/Assets/Game/shader/XShader/XPbr_Base.hlsl
+++ b/Client/Assets/Game/shader/XShader/XPbr_Base.hlsl
@@ -122,7 +122,10 @@ void InitializeInputData(Varyings input, half3 normalTS, out InputData inputData
 #else
     inputData.bakedGI = SampleSH(inputData.normalWS);
 #endif
-    inputData.bakedGI = SampleXRuntimeAmbient(inputData.normalWS);
+    // 仅在运行时全局环境光开启后才覆盖（Game.cs 设置）；否则保留场景自身 SH/光照贴图，
+    // 避免编辑器预览比 URP Lit 亮（旧写法无条件覆盖成硬编码的高强度三色环境光）
+    if (_XRuntimeAmbientEnabled > 0.5h)
+        inputData.bakedGI = SampleXRuntimeAmbient(inputData.normalWS);
 
     inputData.normalizedScreenSpaceUV = GetNormalizedScreenSpaceUV(input.positionCS);
     inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);
diff --git a/Client/Assets/Game/shader/XShader/XTerrain_Base.hlsl b/Client/Assets/Game/shader/XShader/XTerrain_Base.hlsl
index 8a83bb34..b9641edb 100644
--- a/Client/Assets/Game/shader/XShader/XTerrain_Base.hlsl
+++ b/Client/Assets/Game/shader/XShader/XTerrain_Base.hlsl
@@ -147,7 +147,10 @@ void InitializeInputData(Varyings input, half3 normalTS, out InputData inputData
 #else
     inputData.bakedGI = SampleSH(inputData.normalWS);
 #endif
-    inputData.bakedGI = SampleXRuntimeAmbient(inputData.normalWS);
+    // 仅在运行时全局环境光开启后才覆盖（Game.cs 设置）；否则保留场景自身 SH/光照贴图，
+    // 避免编辑器预览比 URP Lit 亮（旧写法无条件覆盖成硬编码的高强度三色环境光）
+    if (_XRuntimeAmbientEnabled > 0.5h)
+        inputData.bakedGI = SampleXRuntimeAmbient(inputData.normalWS);
 
     inputData.normalizedScreenSpaceUV = GetNormalizedScreenSpaceUV(input.positionCS);
     inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);
diff --git a/Client/Assets/Game/shader/XShader/XTex_Base.hlsl b/Client/Assets/Game/shader/XShader/XTex_Base.hlsl
index dbae7161..aa0cdcd0 100644
--- a/Client/Assets/Game/shader/XShader/XTex_Base.hlsl
+++ b/Client/Assets/Game/shader/XShader/XTex_Base.hlsl
@@ -149,7 +149,10 @@ void InitializeInputData(Varyings input, half3 normalTS, out InputData inputData
 #else
     inputData.bakedGI = SampleSH(inputData.normalWS);
 #endif
-    inputData.bakedGI = SampleXRuntimeAmbient(inputData.normalWS);
+    // 仅在运行时全局环境光开启后才覆盖（Game.cs 设置）；否则保留场景自身 SH/光照贴图，
+    // 避免编辑器预览比 URP Lit 亮（旧写法无条件覆盖成硬编码的高强度三色环境光）
+    if (_XRuntimeAmbientEnabled > 0.5h)
+        inputData.bakedGI = SampleXRuntimeAmbient(inputData.normalWS);
 
     inputData.normalizedScreenSpaceUV = GetNormalizedScreenSpaceUV(input.positionCS);
     inputData.shadowMask = SAMPLE_SHADOWMASK(input.staticLightmapUV);