diff --git a/apps/navmeshtool/main.cpp b/apps/navmeshtool/main.cpp
index 6cfa7fc61d..63effd41a2 100644
--- a/apps/navmeshtool/main.cpp
+++ b/apps/navmeshtool/main.cpp
@@ -39,6 +39,7 @@
 #include <filesystem>
 #include <iostream>
 #include <map>
+#include <regex>
 #include <string>
 #include <thread>
 #include <type_traits>
@@ -119,6 +120,10 @@ namespace NavMeshTool
             addOption("write-binary-log", bpo::value<bool>()->implicit_value(true)->default_value(false),
                 "write progress in binary messages to be consumed by the launcher");
 
+            addOption("worldspace-filter", bpo::value<std::string>()->default_value(".*"),
+                "Regular expression to filter in specified worldspaces in modified ECMAScript grammar (see "
+                "https://en.cppreference.com/w/cpp/regex/ecmascript.html)");
+
             Files::ConfigurationManager::addCommonOptions(result);
 
             return result;
@@ -180,6 +185,8 @@ namespace NavMeshTool
             const bool removeUnusedTiles = variables["remove-unused-tiles"].as<bool>();
             const bool writeBinaryLog = variables["write-binary-log"].as<bool>();
 
+            const std::regex worldspaceFilter(variables["worldspace-filter"].as<std::string>());
+
 #ifdef WIN32
             if (writeBinaryLog)
                 _setmode(_fileno(stderr), _O_BINARY);
@@ -229,8 +236,8 @@ namespace NavMeshTool
             navigatorSettings.mRecast.mSwimHeightScale
                 = EsmLoader::getGameSetting(esmData.mGameSettings, "fSwimHeightScale").getFloat();
 
-            WorldspaceData cellsData = gatherWorldspaceData(
-                navigatorSettings, readers, vfs, bulletShapeManager, esmData, processInteriorCells, writeBinaryLog);
+            WorldspaceData cellsData = gatherWorldspaceData(navigatorSettings, readers, vfs, bulletShapeManager,
+                esmData, processInteriorCells, writeBinaryLog, worldspaceFilter);
 
             const Status status = generateAllNavMeshTiles(agentBounds, navigatorSettings, threadsNumber,
                 removeUnusedTiles, writeBinaryLog, cellsData, std::move(db));
diff --git a/apps/navmeshtool/worldspacedata.cpp b/apps/navmeshtool/worldspacedata.cpp
index df5c48e7ab..43b3ae5da3 100644
--- a/apps/navmeshtool/worldspacedata.cpp
+++ b/apps/navmeshtool/worldspacedata.cpp
@@ -245,7 +245,7 @@ namespace NavMeshTool
 
     WorldspaceData gatherWorldspaceData(const DetourNavigator::Settings& settings, ESM::ReadersCache& readers,
         const VFS::Manager& vfs, Resource::BulletShapeManager& bulletShapeManager, const EsmLoader::EsmData& esmData,
-        bool processInteriorCells, bool writeBinaryLog)
+        bool processInteriorCells, bool writeBinaryLog, const std::regex& worldspaceFilter)
     {
         Log(Debug::Info) << "Processing " << esmData.mCells.size() << " cells...";
 
@@ -272,12 +272,23 @@ namespace NavMeshTool
                 continue;
             }
 
+            const ESM::RefId cellWorldspace = cell.isExterior() ? ESM::Cell::sDefaultWorldspaceId : cell.mId;
+
+            if (!std::regex_match(cellWorldspace.toString(), worldspaceFilter))
+            {
+                Log(Debug::Info) << "Skipped filtered out"
+                                 << " cell (" << (i + 1) << "/" << esmData.mCells.size() << ") \""
+                                 << cell.getDescription() << "\" from " << cellWorldspace << " worldspace";
+                continue;
+            }
+
             Log(Debug::Debug) << "Processing " << (exterior ? "exterior" : "interior") << " cell (" << (i + 1) << "/"
-                              << esmData.mCells.size() << ") \"" << cell.getDescription() << "\"";
+                              << esmData.mCells.size() << ") \"" << cell.getDescription() << "\" from "
+                              << cellWorldspace << " worldspace";
 
             const osg::Vec2i cellPosition(cell.mData.mX, cell.mData.mY);
             const std::size_t cellObjectsBegin = data.mObjects.size();
-            const ESM::RefId cellWorldspace = cell.isExterior() ? ESM::Cell::sDefaultWorldspaceId : cell.mId;
+
             WorldspaceNavMeshInput& navMeshInput = [&]() -> WorldspaceNavMeshInput& {
                 auto it = navMeshInputs.find(cellWorldspace);
                 if (it == navMeshInputs.end())
@@ -354,8 +365,8 @@ namespace NavMeshTool
                 serializeToStderr(ProcessedCells{ static_cast<std::uint64_t>(i + 1) });
 
             Log(Debug::Info) << "Processed " << (exterior ? "exterior" : "interior") << " cell (" << (i + 1) << "/"
-                             << esmData.mCells.size() << ") " << cellDescription << " with "
-                             << (data.mObjects.size() - cellObjectsBegin) << " objects";
+                             << esmData.mCells.size() << ") " << cellDescription << " from " << cellWorldspace
+                             << " worldspace with " << (data.mObjects.size() - cellObjectsBegin) << " objects";
         }
 
         data.mNavMeshInputs.reserve(navMeshInputs.size());
diff --git a/apps/navmeshtool/worldspacedata.hpp b/apps/navmeshtool/worldspacedata.hpp
index 7096cf95ed..5a74a57342 100644
--- a/apps/navmeshtool/worldspacedata.hpp
+++ b/apps/navmeshtool/worldspacedata.hpp
@@ -12,7 +12,7 @@
 #include <LinearMath/btVector3.h>
 
 #include <memory>
-#include <string>
+#include <regex>
 #include <vector>
 
 namespace ESM
@@ -90,7 +90,7 @@ namespace NavMeshTool
 
     WorldspaceData gatherWorldspaceData(const DetourNavigator::Settings& settings, ESM::ReadersCache& readers,
         const VFS::Manager& vfs, Resource::BulletShapeManager& bulletShapeManager, const EsmLoader::EsmData& esmData,
-        bool processInteriorCells, bool writeBinaryLog);
+        bool processInteriorCells, bool writeBinaryLog, const std::regex& worldspaceFilter);
 }
 
 #endif