diff --git a/App/editor/StatsPanel.cpp b/App/editor/StatsPanel.cpp
index d7ed23d..4d3a5cd 100644
--- a/App/editor/StatsPanel.cpp
+++ b/App/editor/StatsPanel.cpp
@@ -95,7 +95,8 @@ void StatsPanel::Draw(const EditorContext& ctx)
         if (bloom)
         {
             f32 threshold = renderer.GetBloomThreshold();
-            if (ImGui::SliderFloat("Threshold", &threshold, 0.0f, 2.0f))
+            if (ImGui::SliderFloat("Threshold", &threshold, 0.0f, 8.0f,
+                                   "%.1f", ImGuiSliderFlags_Logarithmic))
             {
                 renderer.SetBloomThreshold(threshold);
             }
diff --git a/Engine/include/Engine/Renderer/Passes/FullscreenGpu.h b/Engine/include/Engine/Renderer/Passes/FullscreenGpu.h
index 203d224..603911e 100644
--- a/Engine/include/Engine/Renderer/Passes/FullscreenGpu.h
+++ b/Engine/include/Engine/Renderer/Passes/FullscreenGpu.h
@@ -36,7 +36,10 @@ namespace Engine {
         struct PostProcessParams {
             f32 exposure = 0.6f;
             bool useACES = true;
-            f32 bloomThreshold = 1.0f;   // HDR 域亮度阈值
+            // HDR 域亮度阈值。注意不能设 1.0：光滑金属反射亮天空的 HDR 值
+            // 普遍 2~50，阈值为 1 会让整片金属表面进 bloom → 白色泛光糊满
+            //（怀表铜壳"纯白"元凶）。3.0 ≈ ACES 后接近白的真高光才泛光
+            f32 bloomThreshold = 3.0f;
             f32 bloomStrength = 0.8f;    // 叠加强度
         };
 
diff --git a/Engine/src/Vulkan/Texture.cpp b/Engine/src/Vulkan/Texture.cpp
index 48e5720..8fe8223 100644
--- a/Engine/src/Vulkan/Texture.cpp
+++ b/Engine/src/Vulkan/Texture.cpp
@@ -173,7 +173,11 @@ namespace Engine
                   .setOldLayout(vk::ImageLayout::eUndefined)
                   .setNewLayout(vk::ImageLayout::eTransferDstOptimal)
                   .setImage(m_Image)
-                  .setSubresourceRange({vk::ImageAspectFlagBits::eColor, 0, 1, 0, 1});
+                  // 整条 mip 链一次性 UNDEFINED → TRANSFER_DST：后续 blit
+                  // 的目标 mip 必须已在目标布局（仅转 mip0 会触发 validation
+                  // 对每个 blit 目标的 UNDEFINED 布局告警）
+                  .setSubresourceRange({vk::ImageAspectFlagBits::eColor,
+                                        0, m_MipLevels, 0, 1});
 
         vk::DependencyInfo dep1;
         dep1.setImageMemoryBarriers(toTransfer);