diff --git a/server/gameserver/mapcollider.cc b/server/gameserver/mapcollider.cc
index fae35ec8..bb71e25f 100644
--- a/server/gameserver/mapcollider.cc
+++ b/server/gameserver/mapcollider.cc
@@ -67,10 +67,10 @@ namespace mc
         {
             auto trig_xobj = xobj->At("mesh")->At("triangles");
             for (int i = 0; i < trig_xobj->Size(); ++i) {
-                mesh.triangles.push_back(trig_xobj->At(i)->AsXValue().GetDouble());
+                mesh.raw_triangles.push_back(trig_xobj->At(i)->AsXValue().GetDouble());
             }
         }
-        if (mesh.triangles.size() % 3 != 0) {
+        if (mesh.raw_triangles.size() % 3 != 0) {
             abort();
         }
         Bounds_Read(mesh.bounds, xobj->At("mesh")->At("bounds"));
diff --git a/server/gameserver/mapcollider.h b/server/gameserver/mapcollider.h
index 8b57822a..bdba98ba 100644
--- a/server/gameserver/mapcollider.h
+++ b/server/gameserver/mapcollider.h
@@ -30,6 +30,16 @@ namespace mc
         glm::vec3 size = glm::vec3(0.0f, 0.0f, 0.0f);
     };
 
+    struct Triangle
+    {
+        glm::vec3 vert0 = glm::vec3(0.0f, 0.0f, 0.0f);
+        glm::vec3 vert1 = glm::vec3(0.0f, 0.0f, 0.0f);
+        glm::vec3 vert2 = glm::vec3(0.0f, 0.0f, 0.0f);
+        float min_y = 0.0f;
+        float max_y = 0.0f;
+        int check_flag = 0;
+    };
+
     struct Transform
     {
         glm::vec3 local_position  = glm::vec3(0.0f, 0.0f, 0.0f);
@@ -38,10 +48,12 @@ namespace mc
         void Read(std::shared_ptr<a8::XObject> xobj);
     };
 
+
     struct Mesh
     {
         std::vector<glm::vec3> vertices;
-        std::vector<int> triangles;
+        std::vector<int> raw_triangles;
+        //std::vector<Triangle> triangles;
         Bounds bounds;
     };
 
diff --git a/server/gameserver/mapinstance.cc b/server/gameserver/mapinstance.cc
index 338e093f..5e356129 100644
--- a/server/gameserver/mapinstance.cc
+++ b/server/gameserver/mapinstance.cc
@@ -57,6 +57,16 @@ static float frand()
     return (float)rand()/(float)RAND_MAX;
 }
 
+static void TraverseMapColliderNode(mc::ColliderNode* node, std::function<void (mc::ColliderNode*)> cb)
+{
+    for (auto& pair : node->childs) {
+        cb(pair.second);
+        if (!pair.second->childs.empty()) {
+            TraverseMapColliderNode(pair.second, cb);
+        }
+    }
+}
+
 void MapInstance::Init()
 {
     map_meta_ = mt::Map::GetById(map_id);
@@ -821,5 +831,15 @@ void MapInstance::LoadHouse()
                 houses_.push_back(p);
             }
         }
+        {
+            for (auto& pair : GetMapMeta()->collider_info->GetNodes()) {
+
+            }
+        }
     }
 }
+
+bool MapInstance::SceneRaycast(const glm::vec3& orig, const glm::vec3& dir, float max_distance, glm::vec3& hit_pos)
+{
+
+}
diff --git a/server/gameserver/mapinstance.h b/server/gameserver/mapinstance.h
index e44a098d..c660a9db 100644
--- a/server/gameserver/mapinstance.h
+++ b/server/gameserver/mapinstance.h
@@ -57,6 +57,7 @@ class MapInstance : public std::enable_shared_from_this<MapInstance>
     void CheckTerrain(Creature* c, int same_poly_flags, const std::vector<dtPolyRef>& spec_polys);
     void TraverseHouseList(std::function<void (HouseInfo*)> func);
     bool PtInHouse(const glm::vec3& pt, glm::vec3& nearest_pt);
+    bool SceneRaycast(const glm::vec3& orig, const glm::vec3& dir, float max_distance, glm::vec3& hit_pos);
 
  private:
     void CreateThings();
@@ -79,6 +80,8 @@ class MapInstance : public std::enable_shared_from_this<MapInstance>
 
     std::list<HouseInfo> houses_;
 
+    std::vector<mc::ColliderNode*> things_;
+
     std::string map_tpl_name_;
     const mt::Map* map_meta_ = nullptr;
     MapService* map_service_ = nullptr;
diff --git a/server/gameserver/mt/MapCollider.h b/server/gameserver/mt/MapCollider.h
index 01d56a63..2fe4e843 100644
--- a/server/gameserver/mt/MapCollider.h
+++ b/server/gameserver/mt/MapCollider.h
@@ -22,6 +22,7 @@ namespace mt
 
         void Load(const std::string& filename);
         mc::ColliderNode* GetNode(const std::string& name);
+        std::map<std::string, mc::ColliderNode*>& GetNodes() { return nodes_; };
 
     private:
         std::map<std::string, mc::ColliderNode*> nodes_;