diff --git a/server/gameserver/mapinstance.cc b/server/gameserver/mapinstance.cc
index f99b32e6..b2c451d2 100644
--- a/server/gameserver/mapinstance.cc
+++ b/server/gameserver/mapinstance.cc
@@ -666,6 +666,28 @@ bool MapInstance::RaycastEx(int layer, const glm::vec3& start, const glm::vec3&
         }
         hit_pos_[1] = closest[1];
     }
+    {
+        bool is_same_flags = true;
+        unsigned short last_flags = 0;
+        spec_polys.reserve(npolys);
+        for (int i = 0; i < npolys; ++i) {
+            unsigned short flags = 0;
+            status = navmesh_->getPolyFlags(polys_[i], &flags);
+            if (!dtStatusSucceed(status)) {
+                abort();
+            }
+            if (flags) {
+                if (last_flags && last_flags != flags) {
+                    is_same_flags = false;
+                }
+                last_flags = flags;
+                spec_polys.push_back(flags);
+            }
+        }
+        if (is_same_flags) {
+            same_polys_flags = last_flags;
+        }
+    }
 
     hit_point.x = hit_pos_[0];
     hit_point.y = hit_pos_[1];
diff --git a/server/gameserver/mapinstance.h b/server/gameserver/mapinstance.h
index f39d25c4..68dc0472 100644
--- a/server/gameserver/mapinstance.h
+++ b/server/gameserver/mapinstance.h
@@ -5,19 +5,6 @@
 
 const int MAX_POLYS = 256;
 
-struct HeightInfo
-{
-    int t = 0;
-    int h = 0;
-};
-
-struct GridInfo
-{
-    bool is_perfect = false;
-    std::vector<HeightInfo*> layers;
-    std::vector<std::list<HeightInfo*>> details;
-};
-
 class Entity;
 class Obstacle;
 class MapService;
@@ -77,10 +64,6 @@ class MapInstance : public std::enable_shared_from_this<MapInstance>
 
     std::vector<int> poly_ext_datas_;
 
-    int grid_width_ = 0;
-    int grid_height_ = 0;
-    std::vector<GridInfo> height_datas_;
-
     std::string map_tpl_name_;
     const mt::Map* map_meta_ = nullptr;
     MapService* map_service_ = nullptr;