diff --git a/Engine/src/Renderer/Model.cpp b/Engine/src/Renderer/Model.cpp
index 3a2a2ee..1715da1 100644
--- a/Engine/src/Renderer/Model.cpp
+++ b/Engine/src/Renderer/Model.cpp
@@ -94,10 +94,24 @@ void Model::LoadModel(const std::string& path)
 {
     m_ModelPath = path;
 
+    // UV 翻转按格式区分：
+    //   OBJ/FBX   —— v 原点在底部，需翻到左上惯例（配合"v=0=图像顶"采样）
+    //   glTF/GLB  —— UV 本就是左上原点（v=0=图像顶），翻转会把所有
+    //                贴图上下颠倒（法线/MR 全反 = 塑料感元凶）
+    const std::string lower = [&] {
+        std::string s = path;
+        std::transform(s.begin(), s.end(), s.begin(),
+                       [](unsigned char c) { return std::tolower(c); });
+        return s;
+    }();
+    const bool isGltf = lower.size() >= 5 &&
+        (lower.rfind(".gltf") == lower.size() - 5 ||
+         lower.rfind(".glb") == lower.size() - 4);
+
     Assimp::Importer importer;
     const aiScene* scene = importer.ReadFile(path,
         aiProcess_Triangulate |
-        aiProcess_FlipUVs |
+        (isGltf ? 0 : aiProcess_FlipUVs) |
         aiProcess_GenSmoothNormals |
         aiProcess_CalcTangentSpace |   // 法线贴图 TBN
         aiProcess_JoinIdenticalVertices);
@@ -236,15 +250,22 @@ Scope<Mesh> Model::ProcessMesh(aiMesh* mesh, const aiScene* scene)
         const std::filesystem::path modelDir =
             std::filesystem::path(m_ModelPath).parent_path();
 
-        // glTF 的 metallicRoughness 贴图落在 aiTextureType_UNKNOWN
+        // glTF2 贴图在 assimp 5.x 的落点：MR 合图 → METALNESS(15)/
+        // DIFFUSE_ROUGHNESS(16)（同图双槽）；baseColor → BASE_COLOR(12)。
+        // 先到先得，数组顺序即优先级
         const std::pair<aiTextureType, u32> slots[] = {
-            {aiTextureType_DIFFUSE,  Material::Albedo},
-            {aiTextureType_NORMALS,  Material::Normal},
-            {aiTextureType_UNKNOWN,  Material::MetallicRoughness},
-            {aiTextureType_EMISSIVE, Material::Emissive},
+            {aiTextureType_DIFFUSE,        Material::Albedo},
+            {aiTextureType_BASE_COLOR,     Material::Albedo},
+            {aiTextureType_NORMALS,        Material::Normal},
+            {aiTextureType_METALNESS,      Material::MetallicRoughness},
+            {aiTextureType_DIFFUSE_ROUGHNESS, Material::MetallicRoughness},
+            {aiTextureType_UNKNOWN,        Material::MetallicRoughness},
+            {aiTextureType_EMISSIVE,       Material::Emissive},
+            {aiTextureType_EMISSION_COLOR, Material::Emissive},
         };
 
         for (const auto& [type, slot] : slots) {
+            if (!texPaths[slot].empty()) continue;   // 高优先级已命中
             aiString path;
             if (material->GetTexture(type, 0, &path) == AI_SUCCESS &&
                 path.length > 0) {
@@ -252,6 +273,19 @@ Scope<Mesh> Model::ProcessMesh(aiMesh* mesh, const aiScene* scene)
             }
         }
 
+        // 材质加载可见性：贴图槽缺失/路径解析错误会静默退化成默认
+        // 纹理（金属全没 → 塑料感），这里留下诊断锚点
+        ENGINE_INFO("Material '{}': albedo={} normal={} MR={} emissive={}",
+                    material->GetName().C_Str(),
+                    texPaths[Material::Albedo].empty() ? "<none>"
+                        : texPaths[Material::Albedo],
+                    texPaths[Material::Normal].empty() ? "<none>"
+                        : texPaths[Material::Normal],
+                    texPaths[Material::MetallicRoughness].empty() ? "<none>"
+                        : texPaths[Material::MetallicRoughness],
+                    texPaths[Material::Emissive].empty() ? "<none>"
+                        : texPaths[Material::Emissive]);
+
         // PBR 因子（glTF2 材质属性；旧资产无此键 → 默认电介质 0/0.5）
         ai_real metallic = 0.0f, roughness = 0.5f;
         material->Get(AI_MATKEY_METALLIC_FACTOR, metallic);