diff --git a/dl/io/dl_file.cpp b/dl/io/dl_file.cpp
index 7c96cf16..19c3fd9f 100644
--- a/dl/io/dl_file.cpp
+++ b/dl/io/dl_file.cpp
@@ -382,11 +382,13 @@ std::ofstream Set(std::string_view path_name,
 	{
 		std::ofstream ret;
 		std::filesystem::path p = MakePath(path_name);
-		std::ofstream::openmode mode = std::ofstream::out | std::ofstream::trunc;
+		std::ofstream::openmode mode = std::ofstream::out;
 		if (is_binary)
 			mode |= std::ofstream::binary;
-		if(is_app)
+		if (is_app)
 			mode |= std::ofstream::app;
+		else
+			mode |= std::ofstream::trunc;
 
 		ret.open(p, mode);
 		return ret;
diff --git a/dl/vk/dl_vk.cpp b/dl/vk/dl_vk.cpp
index 4a55e315..3e8edc19 100644
--- a/dl/vk/dl_vk.cpp
+++ b/dl/vk/dl_vk.cpp
@@ -5326,10 +5326,11 @@ size_t VK::LoadSkybox(std::string_view path)
 		}
 		for (size_t i = 0; i < vec.size(); ++i)
 		{
-			std::string_view sub = String::Range(str, '(', ')');
+			std::string_view sub = String::Range(vec[i], '(', ')');
 			Position3 pos = String::toPosition<3>(sub);
 			sky._sh[i] = toLonger(pos, 1.0f);
 		}
+		
 	}
 	// env
 	{
diff --git a/project/dl_test/head.cpp b/project/dl_test/head.cpp
index 85e6aabf..68b6379b 100644
--- a/project/dl_test/head.cpp
+++ b/project/dl_test/head.cpp
@@ -42,7 +42,7 @@ void Release()
 int Main()
 {
 	g_log->SetLogFile("log/");
-	Engine::GetParamRef()._test = true;
+	//Engine::GetParamRef()._test = true;
 	Engine::Init();
 
 	Position p0;
diff --git a/project/dl_test/res/skybox/1k/ibl.ktx b/project/dl_test/res/skybox/1k/ibl.ktx
new file mode 100644
index 00000000..90c0064e
Binary files /dev/null and b/project/dl_test/res/skybox/1k/ibl.ktx differ
diff --git a/project/dl_test/res/skybox/1k/sh.txt b/project/dl_test/res/skybox/1k/sh.txt
new file mode 100644
index 00000000..65640e00
--- /dev/null
+++ b/project/dl_test/res/skybox/1k/sh.txt
@@ -0,0 +1,9 @@
+( 0.960040628910065,  0.976856768131256,  0.991280019283295); // L00, irradiance, pre-scaled base
+( 0.092061169445515,  0.108219303190708,  0.142399802803993); // L1-1, irradiance, pre-scaled base
+( 0.663774013519287,  0.680283844470978,  0.702139258384705); // L10, irradiance, pre-scaled base
+(-1.100530743598938, -1.131452918052673, -1.174658179283142); // L11, irradiance, pre-scaled base
+(-0.215782374143600, -0.222449794411659, -0.234213143587112); // L2-2, irradiance, pre-scaled base
+( 0.132715985178947,  0.138284355401993,  0.148159787058830); // L2-1, irradiance, pre-scaled base
+(-0.033982470631599, -0.034430146217346, -0.034987017512321); // L20, irradiance, pre-scaled base
+(-0.556232213973999, -0.572198092937469, -0.594641625881195); // L21, irradiance, pre-scaled base
+( 0.180936083197594,  0.188229963183403,  0.200044557452202); // L22, irradiance, pre-scaled base
diff --git a/project/dl_test/res/skybox/1k/skybox.ktx b/project/dl_test/res/skybox/1k/skybox.ktx
new file mode 100644
index 00000000..6ccb3ecb
Binary files /dev/null and b/project/dl_test/res/skybox/1k/skybox.ktx differ
diff --git a/project/dl_test/ui_actor.cpp b/project/dl_test/ui_actor.cpp
index 8c7d3858..05efa85d 100644
--- a/project/dl_test/ui_actor.cpp
+++ b/project/dl_test/ui_actor.cpp
@@ -55,10 +55,9 @@ UIActor::UIActor() :
 
 	
 
-	g_factory->LoadSkybox("skybox/4k/");
+	g_factory->LoadSkybox("skybox/1k/");
 	g_factory->LoadSkybox("skybox/2k/");
-
-	g_factory->SetSkybox(1);
+	g_factory->LoadSkybox("skybox/4k/");
 }
 
 void UIActor::Update()
@@ -103,6 +102,15 @@ void UIActor::Update()
 
 	_light.SetDirection({ -1.0f, 1.0f, -1.0f });
 	//_light.SetStrength({ 8.0f, 8.0f, 8.0f });
+
+	if(g_input->KeyUp(KeyCode::KEY1))
+		g_factory->SetSkybox(1);
+	if (g_input->KeyUp(KeyCode::KEY2))
+		g_factory->SetSkybox(2);
+	if (g_input->KeyUp(KeyCode::KEY3))
+		g_factory->SetSkybox(3);
+	if (g_input->KeyUp(KeyCode::KEY0))
+		g_factory->SetSkybox(0);
 }
 
 void UIActor::Render()
diff --git a/res/dl/shader/3d_bone_frag.spv b/res/dl/shader/3d_bone_frag.spv
index f8578714..374ce971 100644
Binary files a/res/dl/shader/3d_bone_frag.spv and b/res/dl/shader/3d_bone_frag.spv differ
diff --git a/res/dl/shader/3d_frag.spv b/res/dl/shader/3d_frag.spv
index f8578714..374ce971 100644
Binary files a/res/dl/shader/3d_frag.spv and b/res/dl/shader/3d_frag.spv differ
diff --git a/shader/3d.frag b/shader/3d.frag
index b24ecd78..b6b66610 100644
--- a/shader/3d.frag
+++ b/shader/3d.frag
@@ -6,6 +6,7 @@
 const float M_PI = 3.141592653589793;
 const float c_MinRoughness = 0.04;
 
+#define ONLY_SH false
 
 layout (constant_id = 0) const int SHADOW_MAP_CASCADE_COUNT = 4;
 layout (constant_id = 1) const int enablePCF = 1;
@@ -181,11 +182,11 @@ vec3 diffuse(PbrInfo pbrInputs)
 	return pbrInputs.diffuseColor / M_PI;
 }
 
+#include "include/tocubemap.glsl"
 // 球谐函数
 vec3 irradianceFromSH(vec3 i_normal)
 {
-	// z up -> y up
-	vec3 normal = vec3(i_normal.y, i_normal.z, i_normal.x);
+	vec3 normal = tocubemap(i_normal);
     vec3 result =
         pass.sh[0].xyz +
         pass.sh[1].xyz * normal.y +
@@ -198,8 +199,6 @@ vec3 irradianceFromSH(vec3 i_normal)
         pass.sh[8].xyz * (normal.x*normal.x - normal.y*normal.y);
     return result * 0.282095;
 }
-
-#include "include/tocubemap.glsl"
 // 计算IBL环境光照
 vec3 getIBLContribution(PbrInfo pbrInputs, vec3 n, vec3 reflection)
 {
@@ -218,6 +217,9 @@ vec3 getIBLContribution(PbrInfo pbrInputs, vec3 n, vec3 reflection)
 
 	// 环境光强度缩放
 	diffuse *= pass.scaleIBLAmbient;
+	if(ONLY_SH)
+		return diffuse;
+
 	specular *= pass.scaleIBLAmbient;
 
 	return diffuse + specular;
@@ -402,6 +404,8 @@ void main()
 	// 最终光照 = 漫反射 + 高光，受法线与灯光夹角影响
 	vec3 color = NdotL * u_LightColor * (diffuseContrib + specContrib);
 	
+	if(ONLY_SH)
+		color = diffuseContrib;
 
 	//----------------------------------阴影计算
 	// 返回所在级联
@@ -430,7 +434,8 @@ void main()
 		shadow = textureProj(shadowCoord, vec2(0.0), cascadeIndex);
 	}
 	// 只影响直射光
-	color *= shadow;
+	if(!ONLY_SH)
+		color *= shadow;
 
 
 	// 计算ibl光照
@@ -449,7 +454,8 @@ void main()
 	 {
 		emissive *= SRGBtoLINEAR(texture(emissiveMap, material.emissiveTextureSet == 0 ? inUV0 : inUV1)).rgb;
 	};
-	color += emissive;
+	if(!ONLY_SH)
+		color += emissive;
 
 	outColor = vec4(color, baseColor.a);
 
diff --git a/tools/cmgen/gen_cube.bat b/tools/cmgen/gen_cube.bat
index d1d4d543..01c8b3b6 100644
--- a/tools/cmgen/gen_cube.bat
+++ b/tools/cmgen/gen_cube.bat
@@ -6,4 +6,5 @@
 cmgen.exe -f ktx -format=ktx -type=ktx --size=1024 --deploy=./output/0 ./hdr/0.hdr
 cmgen.exe -f ktx -format=ktx -type=ktx --size=512 --deploy=./output/1 ./hdr/1.hdr
 cmgen.exe -f ktx -format=ktx -type=ktx --size=256 --deploy=./output/2 ./hdr/2.hdr
+cmgen.exe -f ktx -format=ktx -type=ktx --size=256 --deploy=./output/3 ./hdr/3.hdr
 pause
\ No newline at end of file
diff --git a/tools/cmgen/hdr/3.hdr b/tools/cmgen/hdr/3.hdr
new file mode 100644
index 00000000..5a34f8d3
Binary files /dev/null and b/tools/cmgen/hdr/3.hdr differ