diff --git a/server/gameserver/constant.h b/server/gameserver/constant.h
index fc28cd0f..5aa57aec 100644
--- a/server/gameserver/constant.h
+++ b/server/gameserver/constant.h
@@ -315,17 +315,6 @@ enum AIMode_e
     kHumanAiMode = 1,
 };
 
-enum ColliderTag_e
-{
-    kHalfWallTag = 1,
-    kColliderSpecTag_Begin = 2,
-    kColliderTag_Grass = 2, //草丛
-    kColliderTag_Water = 3, //水
-    kColliderTag_Ice = 4, //冰
-    kColliderTag_MountainTop = 5, //山顶
-    kColliderSpecTag_End = 5,
-};
-
 enum PostBuffAction_e
     {
      kRemoveBuffByIdAction = 1,
@@ -537,14 +526,6 @@ const int MAX_AI_LEVEL = 8;
 
 const int HUNLUAN_BUFFID = 6001;
 
-const long long SPEC_MAP_OBJECT_FLAGS =
-    A8_DEFINE_RANGE_BIT
-    (
-     long long,
-     kColliderSpecTag_Begin,
-     kColliderSpecTag_End
-     );
-
 const int ANDROID_AI_ID_START = 10001;
 
 const int MAX_SKILL_LV = 15;
diff --git a/server/gameserver/creature.cc b/server/gameserver/creature.cc
index ef2fc7a6..2ef63330 100644
--- a/server/gameserver/creature.cc
+++ b/server/gameserver/creature.cc
@@ -1415,10 +1415,12 @@ void Creature::CheckSpecObject()
 {
     long long old_cell_flags = cell_flags_;
     cell_flags_ = 0;
+    int ext_flags = 0;
     {
         int poly_idx = 0;
         dtPoly* poly = room->map_instance->GetPoly(GetPos().ToGlmVec3(), poly_idx);
         if (poly) {
+            ext_flags = room->GetPolyExtFlag(poly_idx);
             #if 0
             if ((poly->flags & SAMPLE_POLYFLAGS_SWIM) == SAMPLE_POLYFLAGS_SWIM) {
                 a8::SetBitFlag(cell_flags_, kColliderTag_Water);
@@ -1427,14 +1429,7 @@ void Creature::CheckSpecObject()
         }
     }
     if (old_cell_flags != cell_flags_) {
-        if (!a8::SameBitFlag(old_cell_flags, cell_flags_, kColliderTag_Grass)) {
-            if (a8::HasBitFlag(cell_flags_, kColliderTag_Grass)) {
-                TryAddBuff(this, kInGrassBuffId);
-            } else {
-                RemoveBuffById(kInGrassBuffId);
-            }
-        }
-
+        #if 0
         if (!a8::SameBitFlag(old_cell_flags, cell_flags_, kColliderTag_Water)) {
             if (a8::HasBitFlag(cell_flags_, kColliderTag_Water)) {
                 TryAddBuff(this, kInWater1BuffId);
@@ -1442,23 +1437,7 @@ void Creature::CheckSpecObject()
                 RemoveBuffByEffectId(kBET_InWater);
             }
         }
-
-        if (!a8::SameBitFlag(old_cell_flags, cell_flags_, kColliderTag_Ice)) {
-            if (a8::HasBitFlag(cell_flags_, kColliderTag_Ice)) {
-                TryAddBuff(this, kInIceBuffId);
-            } else {
-                RemoveBuffById(kInIceBuffId);
-            }
-        }
-
-        if (!a8::SameBitFlag(old_cell_flags, cell_flags_, kColliderTag_MountainTop)) {
-            if (a8::HasBitFlag(cell_flags_, kColliderTag_MountainTop)) {
-                TryAddBuff(this, kInMountainTopBuffId);
-            } else {
-                RemoveBuffById(kInMountainTopBuffId);
-            }
-        }
-
+        #endif
     }
 }
 
diff --git a/server/gameserver/human.cc b/server/gameserver/human.cc
index f00e8d01..fe1a0b83 100644
--- a/server/gameserver/human.cc
+++ b/server/gameserver/human.cc
@@ -473,9 +473,11 @@ float Human::GetSpeed()
    speed = (speed + GetAbility()->GetAttrAbs(kHAT_Speed)) *
        (1 + GetAbility()->GetAttrRate(kHAT_Speed));
    #endif
+   #if 0
    if (a8::HasBitFlag(cell_flags_, kColliderTag_Water)) {
        speed *= mt::Param::s().water_move_coefficient;
    }
+   #endif
    return std::max(speed, 1.0f);
 }