diff --git a/src/content/ContentControl.cpp b/src/content/ContentControl.cpp
index c0ed582d..9c99135b 100644
--- a/src/content/ContentControl.cpp
+++ b/src/content/ContentControl.cpp
@@ -54,7 +54,7 @@ void ContentControl::resetContent() {
     scripting::cleanup();
     std::vector<PathsRoot> resRoots;
     {
-        auto pack = ContentPack::createCore(paths);
+        auto pack = ContentPack::createCore();
         resRoots.push_back({"core", pack.folder});
         load_configs(input, pack.folder);
     }
@@ -66,8 +66,7 @@ void ContentControl::resetContent() {
     content.reset();
     scripting::on_content_reset();
 
-    contentPacks.clear();
-    contentPacks = manager->getAll(basePacks);
+    setContentPacksRaw(manager->getAll(basePacks));
 
     postContent();
 }
@@ -98,10 +97,8 @@ void ContentControl::loadContent() {
     ContentBuilder contentBuilder;
     corecontent::setup(input, contentBuilder);
 
-    auto corePack = ContentPack::createCore(paths);
-
-    auto allPacks = contentPacks;
-    allPacks.insert(allPacks.begin(), corePack);
+    allPacks = contentPacks;
+    allPacks.insert(allPacks.begin(), ContentPack::createCore());
 
     // Setup filesystem entry points
     std::vector<PathsRoot> resRoots;
@@ -122,14 +119,21 @@ void ContentControl::loadContent() {
     postContent();
 }
 
-std::vector<ContentPack>& ContentControl::getContentPacks() {
+void ContentControl::setContentPacksRaw(std::vector<ContentPack>&& packs) {
+    if (content) {
+        throw std::runtime_error("setContentPacksRaw called with content loaded");
+    }
+    contentPacks = std::move(packs);
+    allPacks = contentPacks;
+    allPacks.insert(allPacks.begin(), ContentPack::createCore());
+}
+
+const std::vector<ContentPack>& ContentControl::getContentPacks() const {
     return contentPacks;
 }
 
-std::vector<ContentPack> ContentControl::getAllContentPacks() {
-    auto packs = contentPacks;
-    packs.insert(packs.begin(), ContentPack::createCore(paths));
-    return packs;
+const std::vector<ContentPack>& ContentControl::getAllContentPacks() const {
+    return allPacks;
 }
 
 PacksManager& ContentControl::scan() {
diff --git a/src/content/ContentControl.hpp b/src/content/ContentControl.hpp
index 4c52ec10..ef45a04a 100644
--- a/src/content/ContentControl.hpp
+++ b/src/content/ContentControl.hpp
@@ -40,8 +40,10 @@ public:
 
     void loadContent();
 
-    std::vector<ContentPack>& getContentPacks();
-    std::vector<ContentPack> getAllContentPacks();
+    void setContentPacksRaw(std::vector<ContentPack>&& packs);
+
+    const std::vector<ContentPack>& getContentPacks() const;
+    const std::vector<ContentPack>& getAllContentPacks() const;
 
     PacksManager& scan();
 private:
@@ -52,4 +54,5 @@ private:
     std::vector<std::string> basePacks;
     std::unique_ptr<PacksManager> manager;
     std::vector<ContentPack> contentPacks;
+    std::vector<ContentPack> allPacks; // includes 'core'
 };
diff --git a/src/content/ContentPack.cpp b/src/content/ContentPack.cpp
index 1451b14c..9114aacd 100644
--- a/src/content/ContentPack.cpp
+++ b/src/content/ContentPack.cpp
@@ -13,7 +13,7 @@
 
 namespace fs = std::filesystem;
 
-ContentPack ContentPack::createCore(const EnginePaths& paths) {
+ContentPack ContentPack::createCore() {
     return ContentPack {
         "core", "Core", ENGINE_VERSION_STRING, "", "", "res:", {}
     };
diff --git a/src/content/ContentPack.hpp b/src/content/ContentPack.hpp
index be0b7c71..d434268a 100644
--- a/src/content/ContentPack.hpp
+++ b/src/content/ContentPack.hpp
@@ -73,7 +73,7 @@ struct ContentPack {
         const std::string& name
     );
 
-    static ContentPack createCore(const EnginePaths&);
+    static ContentPack createCore();
 
     static inline io::path getFolderFor(ContentType type) {
         switch (type) {
diff --git a/src/frontend/screens/LevelScreen.cpp b/src/frontend/screens/LevelScreen.cpp
index 210ef802..ca80ed11 100644
--- a/src/frontend/screens/LevelScreen.cpp
+++ b/src/frontend/screens/LevelScreen.cpp
@@ -115,6 +115,7 @@ LevelScreen::~LevelScreen() {
 void LevelScreen::initializeContent() {
     auto& content = controller->getLevel()->content;
     for (auto& entry : content.getPacks()) {
+        logger.info() << "initializing pack '" << entry.first << "'";
         initializePack(entry.second.get());
     }
     scripting::on_frontend_init(
diff --git a/src/io/engine_paths.cpp b/src/io/engine_paths.cpp
index 39851228..4c424f95 100644
--- a/src/io/engine_paths.cpp
+++ b/src/io/engine_paths.cpp
@@ -149,8 +149,12 @@ void EnginePaths::setProjectFolder(std::filesystem::path folder) {
 }
 
 void EnginePaths::setCurrentWorldFolder(io::path folder) {
+    if (folder.empty()) {
+        io::remove_device("world");
+    } else {
+        io::create_subdevice("world", "user", folder);
+    }
     this->currentWorldFolder = std::move(folder);
-    io::create_subdevice("world", "user", currentWorldFolder);
 }
 
 std::string EnginePaths::mount(const io::path& file) {
diff --git a/src/logic/EngineController.cpp b/src/logic/EngineController.cpp
index 9cfbba30..0d0a5a60 100644
--- a/src/logic/EngineController.cpp
+++ b/src/logic/EngineController.cpp
@@ -323,7 +323,7 @@ static void reconfig_packs_outside(
         names.erase(std::find(names.begin(), names.end(), id));
     }
     names = manager.assemble(names);
-    contentControl.getContentPacks() = manager.getAll(names);
+    contentControl.setContentPacksRaw(manager.getAll(names));
 }
 
 static void reconfig_packs_inside(