diff --git a/client/Client.h b/client/Client.h
index b9c98768b..86538827c 100644
--- a/client/Client.h
+++ b/client/Client.h
@@ -209,8 +209,8 @@ public:
 	void heroExchange(ObjectInstanceID hero1, ObjectInstanceID hero2) override {};
 	void castSpell(const spells::Caster * caster, SpellID spellID, const int3 &pos) override {};
 
-	void changeFogOfWar(int3 center, ui32 radius, PlayerColor player, bool hide) override {}
-	void changeFogOfWar(std::unordered_set<int3> & tiles, PlayerColor player, bool hide) override {}
+	void changeFogOfWar(int3 center, ui32 radius, PlayerColor player, ETileVisibility mode) override {}
+	void changeFogOfWar(std::unordered_set<int3> & tiles, PlayerColor player, ETileVisibility mode) override {}
 
 	void setObjProperty(ObjectInstanceID objid, int prop, si64 val) override {}
 
diff --git a/client/NetPacksClient.cpp b/client/NetPacksClient.cpp
index affbdf49e..483bb1126 100644
--- a/client/NetPacksClient.cpp
+++ b/client/NetPacksClient.cpp
@@ -177,7 +177,7 @@ void ApplyClientNetPackVisitor::visitFoWChange(FoWChange & pack)
 		}
 		if(cl.getPlayerRelations(i.first, pack.player) != PlayerRelations::ENEMIES)
 		{
-			if(pack.mode == FoWChange::Mode::REVEAL)
+			if(pack.mode == ETileVisibility::REVEALED)
 				i.second->tileRevealed(pack.tiles);
 			else
 				i.second->tileHidden(pack.tiles);
diff --git a/lib/CGameInfoCallback.cpp b/lib/CGameInfoCallback.cpp
index 45b72a8b4..2be582779 100644
--- a/lib/CGameInfoCallback.cpp
+++ b/lib/CGameInfoCallback.cpp
@@ -942,7 +942,7 @@ bool CGameInfoCallback::isInTheMap(const int3 &pos) const
 
 void CGameInfoCallback::getVisibleTilesInRange(std::unordered_set<int3> &tiles, int3 pos, int radious, int3::EDistanceFormula distanceFormula) const
 {
-	gs->getTilesInRange(tiles, pos, radious, *getPlayerID(), -1, distanceFormula);
+	gs->getTilesInRange(tiles, pos, radious, ETileVisibility::REVEALED, *getPlayerID(),  distanceFormula);
 }
 
 void CGameInfoCallback::calculatePaths(const std::shared_ptr<PathfinderConfig> & config)
@@ -955,7 +955,6 @@ void CGameInfoCallback::calculatePaths( const CGHeroInstance *hero, CPathsInfo &
 	gs->calculatePaths(hero, out);
 }
 
-
 const CArtifactInstance * CGameInfoCallback::getArtInstance( ArtifactInstanceID aid ) const
 {
 	return gs->map->artInstances[aid.num];
diff --git a/lib/IGameCallback.cpp b/lib/IGameCallback.cpp
index 55ceaf9cd..673f8cfa7 100644
--- a/lib/IGameCallback.cpp
+++ b/lib/IGameCallback.cpp
@@ -78,8 +78,8 @@ void CPrivilegedInfoCallback::getFreeTiles(std::vector<int3> & tiles) const
 void CPrivilegedInfoCallback::getTilesInRange(std::unordered_set<int3> & tiles,
 											  const int3 & pos,
 											  int radious,
+											  ETileVisibility mode,
 											  std::optional<PlayerColor> player,
-											  int mode,
 											  int3::EDistanceFormula distanceFormula) const
 {
 	if(!!player && !player->isValidPlayer())
@@ -102,8 +102,8 @@ void CPrivilegedInfoCallback::getTilesInRange(std::unordered_set<int3> & tiles,
 				if(distance <= radious)
 				{
 					if(!player
-						|| (mode == 1  && (*team->fogOfWarMap)[pos.z][xd][yd] == 0)
-						|| (mode == -1 && (*team->fogOfWarMap)[pos.z][xd][yd] == 1)
+						|| (mode == ETileVisibility::HIDDEN  && (*team->fogOfWarMap)[pos.z][xd][yd] == 0)
+						|| (mode == ETileVisibility::REVEALED && (*team->fogOfWarMap)[pos.z][xd][yd] == 1)
 					)
 						tiles.insert(int3(xd,yd,pos.z));
 				}
diff --git a/lib/IGameCallback.h b/lib/IGameCallback.h
index e1f82f87c..33d7737bf 100644
--- a/lib/IGameCallback.h
+++ b/lib/IGameCallback.h
@@ -51,9 +51,9 @@ public:
 	//mode 1 - only unrevealed tiles; mode 0 - all, mode -1 -  only revealed
 	void getTilesInRange(std::unordered_set<int3> & tiles,
 						 const int3 & pos,
-						 int radious,
+						 int radius,
+						 ETileVisibility mode,
 						 std::optional<PlayerColor> player = std::optional<PlayerColor>(),
-						 int mode = 0,
 						 int3::EDistanceFormula formula = int3::DIST_2D) const;
 
 	//returns all tiles on given level (-1 - both levels, otherwise number of level)
@@ -125,8 +125,8 @@ public:
 	virtual void changeObjPos(ObjectInstanceID objid, int3 newPos, const PlayerColor & initiator)=0;
 	virtual void sendAndApply(CPackForClient * pack) = 0;
 	virtual void heroExchange(ObjectInstanceID hero1, ObjectInstanceID hero2)=0; //when two heroes meet on adventure map
-	virtual void changeFogOfWar(int3 center, ui32 radius, PlayerColor player, bool hide) = 0;
-	virtual void changeFogOfWar(std::unordered_set<int3> &tiles, PlayerColor player, bool hide) = 0;
+	virtual void changeFogOfWar(int3 center, ui32 radius, PlayerColor player, ETileVisibility mode) = 0;
+	virtual void changeFogOfWar(std::unordered_set<int3> &tiles, PlayerColor player, ETileVisibility mode) = 0;
 	
 	virtual void castSpell(const spells::Caster * caster, SpellID spellID, const int3 &pos) = 0;
 };
diff --git a/lib/NetPacks.h b/lib/NetPacks.h
index 017cc0118..6bc6e3f9d 100644
--- a/lib/NetPacks.h
+++ b/lib/NetPacks.h
@@ -344,17 +344,11 @@ struct DLL_LINKAGE SetMovePoints : public CPackForClient
 
 struct DLL_LINKAGE FoWChange : public CPackForClient
 {
-	enum class Mode : uint8_t
-	{
-		HIDE,
-		REVEAL
-	};
-
 	void applyGs(CGameState * gs);
 
 	std::unordered_set<int3> tiles;
 	PlayerColor player;
-	Mode mode;
+	ETileVisibility mode;
 	bool waitForDialogs = false;
 
 	virtual void visitTyped(ICPackVisitor & visitor) override;
diff --git a/lib/NetPacksLib.cpp b/lib/NetPacksLib.cpp
index 65d4878af..5dddc2ff4 100644
--- a/lib/NetPacksLib.cpp
+++ b/lib/NetPacksLib.cpp
@@ -924,9 +924,9 @@ void FoWChange::applyGs(CGameState *gs)
 	TeamState * team = gs->getPlayerTeam(player);
 	auto fogOfWarMap = team->fogOfWarMap;
 	for(const int3 & t : tiles)
-		(*fogOfWarMap)[t.z][t.x][t.y] = mode != Mode::HIDE;
+		(*fogOfWarMap)[t.z][t.x][t.y] = mode != ETileVisibility::HIDDEN;
 
-	if (mode == Mode::HIDE) //do not hide too much
+	if (mode == ETileVisibility::HIDDEN) //do not hide too much
 	{
 		std::unordered_set<int3> tilesRevealed;
 		for (auto & elem : gs->map->objects)
@@ -941,7 +941,7 @@ void FoWChange::applyGs(CGameState *gs)
 				case Obj::TOWN:
 				case Obj::ABANDONED_MINE:
 					if(vstd::contains(team->players, o->tempOwner)) //check owned observators
-						gs->getTilesInRange(tilesRevealed, o->getSightCenter(), o->getSightRadius(), o->tempOwner, 1);
+						gs->getTilesInRange(tilesRevealed, o->getSightCenter(), o->getSightRadius(), ETileVisibility::HIDDEN, o->tempOwner);
 					break;
 				}
 			}
diff --git a/lib/constants/Enumerations.h b/lib/constants/Enumerations.h
index 1c2cd7b06..c594cc271 100644
--- a/lib/constants/Enumerations.h
+++ b/lib/constants/Enumerations.h
@@ -250,4 +250,10 @@ enum class EBattleResult : int8_t
 	SURRENDER = 2,
 };
 
+enum class ETileVisibility : int8_t // Fog of war change
+{
+	HIDDEN,
+	REVEALED
+};
+
 VCMI_LIB_NAMESPACE_END
diff --git a/lib/gameState/CGameState.cpp b/lib/gameState/CGameState.cpp
index ffdd990df..87f8fac92 100644
--- a/lib/gameState/CGameState.cpp
+++ b/lib/gameState/CGameState.cpp
@@ -939,7 +939,7 @@ void CGameState::initFogOfWar()
 			if(!obj || !vstd::contains(elem.second.players, obj->tempOwner)) continue; //not a flagged object
 
 			std::unordered_set<int3> tiles;
-			getTilesInRange(tiles, obj->getSightCenter(), obj->getSightRadius(), obj->tempOwner, 1);
+			getTilesInRange(tiles, obj->getSightCenter(), obj->getSightRadius(), ETileVisibility::HIDDEN, obj->tempOwner);
 			for(const int3 & tile : tiles)
 			{
 				(*elem.second.fogOfWarMap)[tile.z][tile.x][tile.y] = 1;
diff --git a/lib/mapObjects/CGTownInstance.cpp b/lib/mapObjects/CGTownInstance.cpp
index 78c4399ba..36543e448 100644
--- a/lib/mapObjects/CGTownInstance.cpp
+++ b/lib/mapObjects/CGTownInstance.cpp
@@ -1066,11 +1066,7 @@ void CGTownInstance::battleFinished(const CGHeroInstance * hero, const BattleRes
 void CGTownInstance::onTownCaptured(const PlayerColor & winner) const
 {
 	setOwner(winner);
-	FoWChange fw;
-	fw.player = winner;
-	fw.mode = FoWChange::Mode::REVEAL;
-	cb->getTilesInRange(fw.tiles, getSightCenter(), getSightRadius(), winner, 1);
-	cb->sendAndApply(& fw);
+	cb->changeFogOfWar(getSightCenter(), getSightRadius(), winner, ETileVisibility::REVEALED);
 }
 
 void CGTownInstance::afterAddToMap(CMap * map)
diff --git a/lib/mapObjects/MiscObjects.cpp b/lib/mapObjects/MiscObjects.cpp
index 36f7fd91a..26c1d0e38 100644
--- a/lib/mapObjects/MiscObjects.cpp
+++ b/lib/mapObjects/MiscObjects.cpp
@@ -1141,14 +1141,14 @@ void CGMagi::onHeroVisit(const CGHeroInstance * h) const
 
 			FoWChange fw;
 			fw.player = h->tempOwner;
-			fw.mode = FoWChange::Mode::REVEAL;
+			fw.mode = ETileVisibility::REVEALED;
 			fw.waitForDialogs = true;
 
 			for(const auto & it : eyelist[subID])
 			{
 				const CGObjectInstance *eye = cb->getObj(it);
 
-				cb->getTilesInRange (fw.tiles, eye->pos, 10, h->tempOwner, 1);
+				cb->getTilesInRange (fw.tiles, eye->pos, 10, ETileVisibility::HIDDEN, h->tempOwner);
 				cb->sendAndApply(&fw);
 				cv.pos = eye->pos;
 
diff --git a/lib/pathfinder/CPathfinder.cpp b/lib/pathfinder/CPathfinder.cpp
index 8044535fb..c5d8cf9a3 100644
--- a/lib/pathfinder/CPathfinder.cpp
+++ b/lib/pathfinder/CPathfinder.cpp
@@ -368,7 +368,7 @@ void CPathfinderHelper::initializePatrol()
 		if(hero->patrol.patrolRadius)
 		{
 			state = PATROL_RADIUS;
-			gs->getTilesInRange(patrolTiles, hero->patrol.initialPos, hero->patrol.patrolRadius, std::optional<PlayerColor>(), 0, int3::DIST_MANHATTAN);
+			gs->getTilesInRange(patrolTiles, hero->patrol.initialPos, hero->patrol.patrolRadius, ETileVisibility::REVEALED, std::optional<PlayerColor>(), int3::DIST_MANHATTAN);
 		}
 		else
 			state = PATROL_LOCKED;
diff --git a/lib/rewardable/Interface.cpp b/lib/rewardable/Interface.cpp
index f13a4a5a5..31b5a74e4 100644
--- a/lib/rewardable/Interface.cpp
+++ b/lib/rewardable/Interface.cpp
@@ -49,17 +49,17 @@ void Rewardable::Interface::grantRewardBeforeLevelup(IGameCallback * cb, const R
 
 	if (info.reward.revealTiles)
 	{
-		auto const & props = *info.reward.revealTiles;
+		const auto & props = *info.reward.revealTiles;
 		FoWChange fw;
 
 		if (props.hide)
-			fw.mode = FoWChange::Mode::HIDE;
+			fw.mode = ETileVisibility::HIDDEN;
 		else
-			fw.mode = FoWChange::Mode::REVEAL;
+			fw.mode = ETileVisibility::REVEALED;
 
 		fw.player = hero->tempOwner;
 
-		auto const functor = [&props](const TerrainTile * tile)
+		const auto functor = [&props](const TerrainTile * tile)
 		{
 			int score = 0;
 			if (tile->terType->isSurface())
@@ -79,9 +79,9 @@ void Rewardable::Interface::grantRewardBeforeLevelup(IGameCallback * cb, const R
 
 		if (props.radius > 0)
 		{
-			cb->getTilesInRange(fw.tiles, hero->getSightCenter(), props.radius, hero->tempOwner, 1);
+			cb->getTilesInRange(fw.tiles, hero->getSightCenter(), props.radius, ETileVisibility::HIDDEN, hero->tempOwner);
 			vstd::erase_if(fw.tiles, [&](const int3 & coord){
-				return functor(cb->getTile(coord));
+				return !functor(cb->getTile(coord));
 			});
 		}
 		else
diff --git a/server/CGameHandler.cpp b/server/CGameHandler.cpp
index 8653120b0..fec358bf8 100644
--- a/server/CGameHandler.cpp
+++ b/server/CGameHandler.cpp
@@ -858,7 +858,7 @@ void CGameHandler::onNewTurn()
 			if (player != PlayerColor::NEUTRAL) //do not reveal fow for neutral player
 			{
 				FoWChange fw;
-				fw.mode = FoWChange::Mode::REVEAL;
+				fw.mode = ETileVisibility::REVEALED;
 				fw.player = player;
 				// find all hidden tiles
 				const auto fow = getPlayerTeam(player)->fogOfWarMap;
@@ -879,7 +879,7 @@ void CGameHandler::onNewTurn()
 			{
 				if (getPlayerStatus(player.first) == EPlayerStatus::INGAME &&
 					getPlayerRelations(player.first, t->tempOwner) == PlayerRelations::ENEMIES)
-					changeFogOfWar(t->visitablePos(), t->getBonusLocalFirst(Selector::type()(BonusType::DARKNESS))->val, player.first, true);
+					changeFogOfWar(t->visitablePos(), t->getBonusLocalFirst(Selector::type()(BonusType::DARKNESS))->val, player.first, ETileVisibility::HIDDEN);
 			}
 		}
 	}
@@ -1174,7 +1174,7 @@ bool CGameHandler::moveHero(ObjectInstanceID hid, int3 dst, ui8 teleporting, boo
 		{
 			obj->onHeroLeave(h);
 		}
-		this->getTilesInRange(tmh.fowRevealed, h->getSightCenter()+(tmh.end-tmh.start), h->getSightRadius(), h->tempOwner, 1);
+		this->getTilesInRange(tmh.fowRevealed, h->getSightCenter()+(tmh.end-tmh.start), h->getSightRadius(), ETileVisibility::HIDDEN, h->tempOwner);
 	};
 
 	auto doMove = [&](TryMoveHero::EResult result, EGuardLook lookForGuards,
@@ -1523,7 +1523,7 @@ void CGameHandler::giveHero(ObjectInstanceID id, PlayerColor player, ObjectInsta
 
 	//Reveal fow around new hero, especially released from Prison
 	auto h = getHero(id);
-	changeFogOfWar(h->pos, h->getSightRadius(), player, false);
+	changeFogOfWar(h->pos, h->getSightRadius(), player, ETileVisibility::REVEALED);
 }
 
 void CGameHandler::changeObjPos(ObjectInstanceID objid, int3 newPos, const PlayerColor & initiator)
@@ -2387,11 +2387,7 @@ bool CGameHandler::buildStructure(ObjectInstanceID tid, BuildingID requestedID,
 		processAfterBuiltStructure(builtID);
 
 	// now when everything is built - reveal tiles for lookout tower
-	FoWChange fw;
-	fw.player = t->tempOwner;
-	fw.mode = FoWChange::Mode::REVEAL;
-	getTilesInRange(fw.tiles, t->getSightCenter(), t->getSightRadius(), t->tempOwner, 1);
-	sendAndApply(&fw);
+	changeFogOfWar(t->getSightCenter(), t->getSightRadius(), t->getOwner(), ETileVisibility::REVEALED);
 
 	if(t->visitingHero)
 		visitCastleObjects(t, t->visitingHero);
@@ -4108,34 +4104,40 @@ void CGameHandler::removeAfterVisit(const CGObjectInstance *object)
 	assert("This function needs to be called during the object visit!");
 }
 
-void CGameHandler::changeFogOfWar(int3 center, ui32 radius, PlayerColor player, bool hide)
+void CGameHandler::changeFogOfWar(int3 center, ui32 radius, PlayerColor player, ETileVisibility mode)
 {
 	std::unordered_set<int3> tiles;
-	getTilesInRange(tiles, center, radius, player, hide? -1 : 1);
-	if (hide)
+
+	if (mode == ETileVisibility::HIDDEN)
 	{
+		getTilesInRange(tiles, center, radius, ETileVisibility::REVEALED, player);
+
 		std::unordered_set<int3> observedTiles; //do not hide tiles observed by heroes. May lead to disastrous AI problems
 		auto p = getPlayerState(player);
 		for (auto h : p->heroes)
 		{
-			getTilesInRange(observedTiles, h->getSightCenter(), h->getSightRadius(), h->tempOwner, -1);
+			getTilesInRange(observedTiles, h->getSightCenter(), h->getSightRadius(), ETileVisibility::REVEALED, h->tempOwner);
 		}
 		for (auto t : p->towns)
 		{
-			getTilesInRange(observedTiles, t->getSightCenter(), t->getSightRadius(), t->tempOwner, -1);
+			getTilesInRange(observedTiles, t->getSightCenter(), t->getSightRadius(), ETileVisibility::REVEALED, t->tempOwner);
 		}
 		for (auto tile : observedTiles)
 			vstd::erase_if_present (tiles, tile);
 	}
-	changeFogOfWar(tiles, player, hide);
+	else
+	{
+		getTilesInRange(tiles, center, radius, ETileVisibility::HIDDEN, player);
+	}
+	changeFogOfWar(tiles, player, mode);
 }
 
-void CGameHandler::changeFogOfWar(std::unordered_set<int3> &tiles, PlayerColor player, bool hide)
+void CGameHandler::changeFogOfWar(std::unordered_set<int3> &tiles, PlayerColor player, ETileVisibility mode)
 {
 	FoWChange fow;
 	fow.tiles = tiles;
 	fow.player = player;
-	fow.mode = hide ? FoWChange::Mode::HIDE : FoWChange::Mode::REVEAL;
+	fow.mode = mode;
 	sendAndApply(&fow);
 }
 
diff --git a/server/CGameHandler.h b/server/CGameHandler.h
index 2784aa6a7..582eb0c2b 100644
--- a/server/CGameHandler.h
+++ b/server/CGameHandler.h
@@ -148,8 +148,8 @@ public:
 	void changeObjPos(ObjectInstanceID objid, int3 newPos, const PlayerColor & initiator) override;
 	void heroExchange(ObjectInstanceID hero1, ObjectInstanceID hero2) override;
 
-	void changeFogOfWar(int3 center, ui32 radius, PlayerColor player, bool hide) override;
-	void changeFogOfWar(std::unordered_set<int3> &tiles, PlayerColor player, bool hide) override;
+	void changeFogOfWar(int3 center, ui32 radius, PlayerColor player, ETileVisibility mode) override;
+	void changeFogOfWar(std::unordered_set<int3> &tiles, PlayerColor player,ETileVisibility mode) override;
 	
 	void castSpell(const spells::Caster * caster, SpellID spellID, const int3 &pos) override;
 
diff --git a/server/processors/PlayerMessageProcessor.cpp b/server/processors/PlayerMessageProcessor.cpp
index 7df0a3cb9..62b30a72e 100644
--- a/server/processors/PlayerMessageProcessor.cpp
+++ b/server/processors/PlayerMessageProcessor.cpp
@@ -346,7 +346,7 @@ void PlayerMessageProcessor::cheatDefeat(PlayerColor player)
 void PlayerMessageProcessor::cheatMapReveal(PlayerColor player, bool reveal)
 {
 	FoWChange fc;
-	fc.mode = reveal ? FoWChange::Mode::REVEAL : FoWChange::Mode::HIDE;
+	fc.mode = reveal ? ETileVisibility::REVEALED : ETileVisibility::HIDDEN;
 	fc.player = player;
 	const auto & fowMap = gameHandler->gameState()->getPlayerTeam(player)->fogOfWarMap;
 	const auto & mapSize = gameHandler->gameState()->getMapSize();
@@ -356,7 +356,7 @@ void PlayerMessageProcessor::cheatMapReveal(PlayerColor player, bool reveal)
 	for(int z = 0; z < mapSize.z; z++)
 		for(int x = 0; x < mapSize.x; x++)
 			for(int y = 0; y < mapSize.y; y++)
-				if(!(*fowMap)[z][x][y] || fc.mode == FoWChange::Mode::HIDE)
+				if(!(*fowMap)[z][x][y] || fc.mode == ETileVisibility::HIDDEN)
 					hlp_tab[lastUnc++] = int3(x, y, z);
 
 	fc.tiles.insert(hlp_tab, hlp_tab + lastUnc);