diff --git a/README.md b/README.md
index 4b74caf8..4d66e39f 100755
--- a/README.md
+++ b/README.md
@@ -3688,3 +3688,6 @@ git clone --recursive git@github.com:FuXiii/Turbo.git
   >
   >* `./samples`下增加`VulkanKHRRayTracingTestForCallableShader`示例。用于研究可调用着色器的使用。
   >* `./asset/shaders`下新增`RayTracingKHRTestForCallableShader.rchit`文件，用于`VulkanKHRRayTracingTestForCallableShader`示例。
+  >* `./asset/shaders`下新增`RayTracingKHRTestForCallableShader_R.rchit`文件，用于`VulkanKHRRayTracingTestForCallableShader`示例。
+  >* `./asset/shaders`下新增`RayTracingKHRTestForCallableShader_G.rchit`文件，用于`VulkanKHRRayTracingTestForCallableShader`示例。
+  >* `./asset/shaders`下新增`RayTracingKHRTestForCallableShader_B.rchit`文件，用于`VulkanKHRRayTracingTestForCallableShader`示例。
diff --git a/asset/shaders/RayTracingKHRTestForCallableShader.rchit b/asset/shaders/RayTracingKHRTestForCallableShader.rchit
index 78c2c550..2a38567b 100644
--- a/asset/shaders/RayTracingKHRTestForCallableShader.rchit
+++ b/asset/shaders/RayTracingKHRTestForCallableShader.rchit
@@ -31,11 +31,11 @@ struct BottomLevelAccelerationStructureDeviceAddress
 layout(location = 0) rayPayloadInEXT HitPayload HIT_PAY_LOAD;
 layout(location = 0) callableDataEXT CallablePayload callablePayload;
 
-//layout(push_constant) uniform my_push_constants
-//{
-//    int callableSBTIndex;
-//}
-//my_push_constants_data;
+layout(push_constant) uniform my_push_constants
+{
+    int callableSBTIndex;
+}
+my_push_constants_data;
 
 layout(buffer_reference, scalar) buffer Vertices
 {
@@ -79,8 +79,7 @@ void main()
     const vec3 light_dir = -normalize(vec3(1, 1, 1));
 
     // Diffuse
-    // executeCallableEXT(my_push_constants_data.callableSBTIndex, 0);
-    executeCallableEXT(0, 0);
+    executeCallableEXT(my_push_constants_data.callableSBTIndex, 0);
 
     const vec3 diffuse_color = callablePayload.color;
     float normalDotLight = max(dot(world_normal, light_dir), 0);
diff --git a/samples/VulkanKHRRayTracingTestForCallableShader.cpp b/samples/VulkanKHRRayTracingTestForCallableShader.cpp
index f6ef5d42..0a3f0335 100644
--- a/samples/VulkanKHRRayTracingTestForCallableShader.cpp
+++ b/samples/VulkanKHRRayTracingTestForCallableShader.cpp
@@ -142,6 +142,11 @@ struct RAY_TRACING_MATRIXS_BUFFER_DATA
     glm::mat4 p;
 };
 
+struct MY_PUSH_CONSTANTS
+{
+    int callableSBTIndex;
+};
+
 int main()
 {
     std::cout << "Vulkan Version:" << Turbo::Core::TVulkanLoader::Instance()->GetVulkanVersion().ToString() << std::endl;
@@ -151,6 +156,9 @@ int main()
 
     MATRIXS_BUFFER_DATA matrixs_buffer_data = {};
 
+    MY_PUSH_CONSTANTS my_push_constants = {};
+    my_push_constants.callableSBTIndex = 0;
+
     //<gltf for material_sphere>
     std::vector<POSITION> POSITION_data;
     std::vector<NORMAL> NORMAL_data;
@@ -1409,14 +1417,19 @@ int main()
 
         device_driver->vkUpdateDescriptorSets(device->GetVkDevice(), vk_write_descriptor_sets.size(), vk_write_descriptor_sets.data(), 0, nullptr);
 
+        VkPushConstantRange vk_push_constant_range = {};
+        vk_push_constant_range.stageFlags = VkShaderStageFlagBits::VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR;
+        vk_push_constant_range.offset = 0;
+        vk_push_constant_range.size = sizeof(my_push_constants);
+
         VkPipelineLayoutCreateInfo ray_tracing_pipeline_layout_create_info = {};
         ray_tracing_pipeline_layout_create_info.sType = VkStructureType::VK_STRUCTURE_TYPE_PIPELINE_LAYOUT_CREATE_INFO;
         ray_tracing_pipeline_layout_create_info.pNext = nullptr;
         ray_tracing_pipeline_layout_create_info.flags = 0;
         ray_tracing_pipeline_layout_create_info.setLayoutCount = 1;
         ray_tracing_pipeline_layout_create_info.pSetLayouts = &ray_tracing_descriptor_set_layout;
-        ray_tracing_pipeline_layout_create_info.pushConstantRangeCount = 0;
-        ray_tracing_pipeline_layout_create_info.pPushConstantRanges = nullptr;
+        ray_tracing_pipeline_layout_create_info.pushConstantRangeCount = 1;
+        ray_tracing_pipeline_layout_create_info.pPushConstantRanges = &vk_push_constant_range;
 
         VkResult ray_tracing_pipeline_layout_create_result = device_driver->vkCreatePipelineLayout(device->GetVkDevice(), &ray_tracing_pipeline_layout_create_info, vk_allocation_callbacks, &ray_tracing_pipeline_layout);
         if (ray_tracing_pipeline_layout_create_result != VkResult::VK_SUCCESS)
@@ -2030,11 +2043,12 @@ int main()
                 static float f = 0.0f;
                 static int counter = 0;
 
-                ImGui::Begin("VulkanKHRRayTracingTestForLighting");
+                ImGui::Begin("VulkanKHRRayTracingTestForCallableShader");
                 ImGui::Text("W,A,S,D to move.");
                 ImGui::Text("Push down and drag mouse right button to rotate view.");
-                ImGui::SliderFloat("angle", &angle, 0.0f, 360);
-                ImGui::SliderFloat("scale", &my_buffer_data.scale, 0.03, 0.1);
+                // ImGui::SliderFloat("angle", &angle, 0.0f, 360);
+                // ImGui::SliderFloat("scale", &my_buffer_data.scale, 0.03, 0.1);
+                ImGui::SliderInt("Callable Index", &my_push_constants.callableSBTIndex, 0, 2);
                 ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
                 ImGui::End();
             }
@@ -2055,6 +2069,7 @@ int main()
             {
                 VkCommandBuffer vk_command_buffer = command_buffer->GetVkCommandBuffer();
                 device_driver->vkCmdBindPipeline(vk_command_buffer, VkPipelineBindPoint::VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR, ray_tracing_pipeline);
+                device_driver->vkCmdPushConstants(vk_command_buffer, ray_tracing_pipeline_layout, VkShaderStageFlagBits::VK_SHADER_STAGE_CLOSEST_HIT_BIT_KHR, 0, sizeof(my_push_constants), &my_push_constants);
                 device_driver->vkCmdBindDescriptorSets(vk_command_buffer, VkPipelineBindPoint::VK_PIPELINE_BIND_POINT_RAY_TRACING_KHR, ray_tracing_pipeline_layout, 0, 1, &ray_tracing_descriptor_set, 0, nullptr);
                 device_driver->vkCmdTraceRaysKHR(vk_command_buffer, &ray_generation_binding_table, &miss_binding_table, &hit_binding_table, &callable_binding_table, swapchain->GetWidth(), swapchain->GetHeight(), 1);