diff --git a/src/content/Content.cpp b/src/content/Content.cpp
index 8e0b0749..fbd5af85 100644
--- a/src/content/Content.cpp
+++ b/src/content/Content.cpp
@@ -12,62 +12,30 @@
 #include "../logic/scripting/scripting.hpp"
 
 ContentIndices::ContentIndices(
-    std::vector<Block*> blockDefs, 
-    std::vector<ItemDef*> itemDefs
-) : blockDefs(std::move(blockDefs)),
-    itemDefs(std::move(itemDefs))
+    std::vector<Block*> blocks, 
+    std::vector<ItemDef*> items
+) : blocks(std::move(blocks)),
+    items(std::move(items))
 {}
 
 Content::Content(
     std::unique_ptr<ContentIndices> indices, 
     std::unique_ptr<DrawGroups> drawGroups,
-    std::unordered_map<std::string, std::unique_ptr<Block>> blockDefs,
-    std::unordered_map<std::string, std::unique_ptr<ItemDef>> itemDefs,
+    ContentUnitDefs<Block> blocks,
+    ContentUnitDefs<ItemDef> items,
     std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs,
     std::unordered_map<std::string, std::unique_ptr<BlockMaterial>> blockMaterials
-) : blockDefs(std::move(blockDefs)),
-    itemDefs(std::move(itemDefs)),
-    indices(std::move(indices)),
+) : indices(std::move(indices)),
     packs(std::move(packs)),
     blockMaterials(std::move(blockMaterials)),
+    blocks(std::move(blocks)),
+    items(std::move(items)),
     drawGroups(std::move(drawGroups)) 
 {}
 
 Content::~Content() {
 }
 
-Block* Content::findBlock(const std::string& id) const {
-    auto found = blockDefs.find(id);
-    if (found == blockDefs.end()) {
-        return nullptr;
-    }
-    return found->second.get();
-}
-
-Block& Content::requireBlock(const std::string& id) const {
-    auto found = blockDefs.find(id);
-    if (found == blockDefs.end()) {
-        throw std::runtime_error("missing block "+id);
-    }
-    return *found->second;
-}
-
-ItemDef* Content::findItem(const std::string& id) const {
-    auto found = itemDefs.find(id);
-    if (found == itemDefs.end()) {
-        return nullptr;
-    }
-    return found->second.get();
-}
-
-ItemDef& Content::requireItem(const std::string& id) const {
-    auto found = itemDefs.find(id);
-    if (found == itemDefs.end()) {
-        throw std::runtime_error("missing item "+id);
-    }
-    return *found->second;
-}
-
 const BlockMaterial* Content::findBlockMaterial(const std::string& id) const {
     auto found = blockMaterials.find(id);
     if (found == blockMaterials.end()) {
diff --git a/src/content/Content.hpp b/src/content/Content.hpp
index 75237757..455bedf1 100644
--- a/src/content/Content.hpp
+++ b/src/content/Content.hpp
@@ -43,61 +43,79 @@ public:
     }
 };
 
+template<class T>
+class ContentUnitIndices {
+    std::vector<T*> defs;
+public:
+    ContentUnitIndices(std::vector<T*> defs) : defs(std::move(defs)) {}
+
+    inline T* get(blockid_t id) const {
+        if (id >= defs.size()) {
+            return nullptr;
+        }
+        return defs[id];
+    }
+
+    inline size_t count() const {
+        return defs.size();
+    }
+
+    inline const T* const* getDefs() const {
+        return defs.data();
+    }
+};
+
 /// @brief Runtime defs cache: indices
 class ContentIndices {
-    std::vector<Block*> blockDefs;
-    std::vector<ItemDef*> itemDefs;
 public:
+    ContentUnitIndices<Block> blocks;
+    ContentUnitIndices<ItemDef> items;
+
     ContentIndices(
         std::vector<Block*> blockDefs, 
         std::vector<ItemDef*> itemDefs
     );
+};
 
-    inline Block* getBlockDef(blockid_t id) const {
-        if (id >= blockDefs.size())
+template<class T>
+class ContentUnitDefs {
+    std::unordered_map<std::string, std::unique_ptr<T>> defs;
+public:
+    ContentUnitDefs(std::unordered_map<std::string, std::unique_ptr<T>> defs) 
+    : defs(std::move(defs)) {
+    }
+
+    T* find(const std::string& id) const {
+        const auto& found = defs.find(id);
+        if (found == defs.end()) {
             return nullptr;
-        return blockDefs[id];
+        }
+        return found->second.get();
     }
-
-    inline ItemDef* getItemDef(itemid_t id) const {
-        if (id >= itemDefs.size())
-            return nullptr;
-        return itemDefs[id];
-    }
-
-    inline size_t countBlockDefs() const {
-        return blockDefs.size();
-    }
-
-    inline size_t countItemDefs() const {
-        return itemDefs.size();
-    }
-
-    // use this for critical spots to prevent range check overhead
-    const Block* const* getBlockDefs() const {
-        return blockDefs.data();
-    }
-
-    const ItemDef* const* getItemDefs() const {
-        return itemDefs.data();
+    T& require(const std::string& id) const {
+        const auto& found = defs.find(id);
+        if (found == defs.end()) {
+            throw std::runtime_error("missing content unit "+id);
+        }
+        return *found->second;
     }
 };
 
-/* Content is a definitions repository */
+/// @brief Content is a definitions repository
 class Content {
-    std::unordered_map<std::string, std::unique_ptr<Block>> blockDefs;
-    std::unordered_map<std::string, std::unique_ptr<ItemDef>> itemDefs;
     std::unique_ptr<ContentIndices> indices;
     std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs;
     std::unordered_map<std::string, std::unique_ptr<BlockMaterial>> blockMaterials;
 public:
+    ContentUnitDefs<Block> blocks;
+    ContentUnitDefs<ItemDef> items;
     std::unique_ptr<DrawGroups> const drawGroups;
 
     Content(
         std::unique_ptr<ContentIndices> indices, 
         std::unique_ptr<DrawGroups> drawGroups,
-        std::unordered_map<std::string, std::unique_ptr<Block>> blockDefs,
-        std::unordered_map<std::string, std::unique_ptr<ItemDef>> itemDefs,
+        ContentUnitDefs<Block> blocks,
+        ContentUnitDefs<ItemDef> items,
         std::unordered_map<std::string, std::unique_ptr<ContentPackRuntime>> packs,
         std::unordered_map<std::string, std::unique_ptr<BlockMaterial>> blockMaterials
     );
@@ -106,15 +124,8 @@ public:
     inline ContentIndices* getIndices() const {
         return indices.get();
     }
-    
-    Block* findBlock(const std::string& id) const;
-    Block& requireBlock(const std::string& id) const;
-
-    ItemDef* findItem(const std::string& id) const;
-    ItemDef& requireItem(const std::string& id) const;
 
     const BlockMaterial* findBlockMaterial(const std::string& id) const;
-
     const ContentPackRuntime* getPackRuntime(const std::string& id) const;
 
     const std::unordered_map<std::string, std::unique_ptr<BlockMaterial>>& getBlockMaterials() const;
diff --git a/src/content/ContentBuilder.cpp b/src/content/ContentBuilder.cpp
index a660ca9a..d292e863 100644
--- a/src/content/ContentBuilder.cpp
+++ b/src/content/ContentBuilder.cpp
@@ -99,11 +99,11 @@ std::unique_ptr<Content> ContentBuilder::build() {
 
     // Now, it's time to resolve foreign keys
     for (Block* def : blockDefsIndices) {
-        def->rt.pickingItem = content->requireItem(def->pickingItem).rt.id;
+        def->rt.pickingItem = content->items.require(def->pickingItem).rt.id;
     }
 
     for (ItemDef* def : itemDefsIndices) {
-        def->rt.placingBlock = content->requireBlock(def->placingBlock).rt.id;
+        def->rt.placingBlock = content->blocks.require(def->placingBlock).rt.id;
     }
 
     return content;
diff --git a/src/content/ContentLUT.cpp b/src/content/ContentLUT.cpp
index bb7ed390..3b0ad1f5 100644
--- a/src/content/ContentLUT.cpp
+++ b/src/content/ContentLUT.cpp
@@ -10,29 +10,45 @@
 
 #include <memory>
 
+template<typename I, class T>
+static void init(std::vector<I>& ids, std::vector<std::string>& names, 
+                 const ContentUnitIndices<T>& indices, size_t count) {
+    for (size_t i = 0; i < count; i++) {
+        ids.push_back(i);
+    }
+    for (size_t i = 0; i < indices.count(); i++) {
+        names.push_back(indices.get(i)->name);
+    }
+    for (size_t i = indices.count(); i < count; i++) {
+        names.emplace_back("");
+    }
+}
+
 ContentLUT::ContentLUT(const Content* content, size_t blocksCount, size_t itemsCount) {
     auto* indices = content->getIndices();
-    for (size_t i = 0; i < blocksCount; i++) {
-        blocks.push_back(i);
-    }
-    for (size_t i = 0; i < indices->countBlockDefs(); i++) {
-        blockNames.push_back(indices->getBlockDef(i)->name);
-    }
-    for (size_t i = indices->countBlockDefs(); i < blocksCount; i++) {
-        blockNames.emplace_back("");
-    }
+    init(blocks, blockNames, indices->blocks, blocksCount);
+    init(items, itemNames, indices->items, itemsCount);
+}
 
-    for (size_t i = 0; i < itemsCount; i++) {
-        items.push_back(i);
-    }
-    for (size_t i = 0; i < indices->countItemDefs(); i++) {
-        itemNames.push_back(indices->getItemDef(i)->name);
-    }
-    for (size_t i = indices->countItemDefs(); i < itemsCount; i++) {
-        itemNames.emplace_back();
+template<class T>
+static void setup_lut(ContentLUT* lut, const ContentUnitDefs<T>& defs, dynamic::List* list) {
+    if (list) {
+        for (size_t i = 0; i < list->size(); i++) {
+            std::string name = list->str(i);
+            if (auto def = defs.find(name)) {
+                lut->setBlock(i, name, def->rt.id);
+            } else {
+                lut->setBlock(i, name, BLOCK_VOID);   
+            }
+        }
     }
 }
 
+template<class T> static constexpr size_t get_entries_count(
+    const ContentUnitIndices<T>& indices, dynamic::List* list) {
+    return list ? std::max(list->size(), indices.count()) : indices.count();
+}
+
 std::shared_ptr<ContentLUT> ContentLUT::create(
     const fs::path& filename, 
     const Content* content
@@ -42,38 +58,13 @@ std::shared_ptr<ContentLUT> ContentLUT::create(
     auto itemlist = root->list("items");
 
     auto* indices = content->getIndices();
-    size_t blocks_c = blocklist 
-                      ? std::max(blocklist->size(), indices->countBlockDefs()) 
-                      : indices->countBlockDefs();
-    size_t items_c = itemlist 
-                     ? std::max(itemlist->size(), indices->countItemDefs()) 
-                     : indices->countItemDefs();    
+    size_t blocks_c = get_entries_count(indices->blocks, blocklist);
+    size_t items_c = get_entries_count(indices->items, itemlist);
 
     auto lut = std::make_shared<ContentLUT>(content, blocks_c, items_c);
 
-    if (blocklist) {
-        for (size_t i = 0; i < blocklist->size(); i++) {
-            std::string name = blocklist->str(i);
-            Block* def = content->findBlock(name);
-            if (def) {
-                lut->setBlock(i, name, def->rt.id);
-            } else {
-                lut->setBlock(i, name, BLOCK_VOID);   
-            }
-        }
-    }
-
-    if (itemlist) {
-        for (size_t i = 0; i < itemlist->size(); i++) {
-            std::string name = itemlist->str(i);
-            ItemDef* def = content->findItem(name);
-            if (def) {
-                lut->setItem(i, name, def->rt.id);
-            } else {
-                lut->setItem(i, name, ITEM_VOID);   
-            }
-        }
-    }
+    setup_lut(lut.get(), content->blocks, blocklist);
+    setup_lut(lut.get(), content->items, itemlist);
 
     if (lut->hasContentReorder() || lut->hasMissingContent()) {
         return lut;
diff --git a/src/files/WorldFiles.cpp b/src/files/WorldFiles.cpp
index 26cef6a6..82b70881 100644
--- a/src/files/WorldFiles.cpp
+++ b/src/files/WorldFiles.cpp
@@ -96,17 +96,16 @@ void WorldFiles::writeIndices(const ContentIndices* indices) {
     dynamic::Map root;
     uint count;
     auto& blocks = root.putList("blocks");
-    count = indices->countBlockDefs();
+    count = indices->blocks.count();
     for (uint i = 0; i < count; i++) {
-        const Block* def = indices->getBlockDef(i);
+        const Block* def = indices->blocks.get(i);
         blocks.put(def->name);
     }
 
     auto& items = root.putList("items");
-    count = indices->countItemDefs();
+    count = indices->items.count();
     for (uint i = 0; i < count; i++) {
-        const ItemDef* def = indices->getItemDef(i);
-        items.put(def->name);
+        items.put(indices->items.get(i)->name);
     }
 
     files::write_json(getIndicesFile(), &root);
diff --git a/src/frontend/ContentGfxCache.cpp b/src/frontend/ContentGfxCache.cpp
index de180760..b18492fd 100644
--- a/src/frontend/ContentGfxCache.cpp
+++ b/src/frontend/ContentGfxCache.cpp
@@ -14,11 +14,11 @@
 
 ContentGfxCache::ContentGfxCache(const Content* content, Assets* assets) : content(content) {
     auto indices = content->getIndices();
-    sideregions = std::make_unique<UVRegion[]>(indices->countBlockDefs() * 6);
+    sideregions = std::make_unique<UVRegion[]>(indices->blocks.count() * 6);
     auto atlas = assets->get<Atlas>("blocks");
     
-    for (uint i = 0; i < indices->countBlockDefs(); i++) {
-        Block* def = indices->getBlockDef(i);
+    for (uint i = 0; i < indices->blocks.count(); i++) {
+        Block* def = indices->blocks.get(i);
         for (uint side = 0; side < 6; side++) {
             const std::string& tex = def->textureFaces[side];
             if (atlas->has(tex)) {
diff --git a/src/frontend/debug_panel.cpp b/src/frontend/debug_panel.cpp
index b49abf89..8af49f86 100644
--- a/src/frontend/debug_panel.cpp
+++ b/src/frontend/debug_panel.cpp
@@ -98,7 +98,7 @@ std::shared_ptr<UINode> create_debug_panel(
     }));
     panel->add(create_label([=](){
         auto* indices = level->content->getIndices();
-        if (auto def = indices->getBlockDef(player->selection.vox.id)) {
+        if (auto def = indices->blocks.get(player->selection.vox.id)) {
             return L"name: " + util::str2wstr_utf8(def->name);
         } else {
             return std::wstring {L"name: void"};
diff --git a/src/frontend/hud.cpp b/src/frontend/hud.cpp
index 53f85baf..21dbc2c7 100644
--- a/src/frontend/hud.cpp
+++ b/src/frontend/hud.cpp
@@ -102,9 +102,9 @@ std::shared_ptr<InventoryView> Hud::createContentAccess() {
     auto indices = content->getIndices();
     auto inventory = player->getInventory();
     
-    int itemsCount = indices->countItemDefs();
+    size_t itemsCount = indices->items.count();
     auto accessInventory = std::make_shared<Inventory>(0, itemsCount);
-    for (int id = 1; id < itemsCount; id++) {
+    for (size_t id = 1; id < itemsCount; id++) {
         accessInventory->getSlot(id-1).set(ItemStack(id, 1));
     }
 
diff --git a/src/graphics/render/BlocksPreview.cpp b/src/graphics/render/BlocksPreview.cpp
index 88a6f111..fa62e318 100644
--- a/src/graphics/render/BlocksPreview.cpp
+++ b/src/graphics/render/BlocksPreview.cpp
@@ -123,7 +123,7 @@ std::unique_ptr<Atlas> BlocksPreview::build(
     const Content* content
 ) {
     auto indices = content->getIndices();
-    size_t count = indices->countBlockDefs();
+    size_t count = indices->blocks.count();
     size_t iconSize = ITEM_ICON_SIZE;
 
     auto shader = assets->get<Shader>("ui3d");
@@ -153,7 +153,7 @@ std::unique_ptr<Atlas> BlocksPreview::build(
     
     fbo.bind();
     for (size_t i = 0; i < count; i++) {
-        auto def = indices->getBlockDef(i);
+        auto def = indices->blocks.get(i);
         atlas->getTexture()->bind();
         builder.add(def->name, draw(cache, shader, &fbo, &batch, def, iconSize));
     }
diff --git a/src/graphics/render/BlocksRenderer.cpp b/src/graphics/render/BlocksRenderer.cpp
index e143f271..ed20f7b3 100644
--- a/src/graphics/render/BlocksRenderer.cpp
+++ b/src/graphics/render/BlocksRenderer.cpp
@@ -40,7 +40,7 @@ BlocksRenderer::BlocksRenderer(
         CHUNK_W + voxelBufferPadding*2, 
         CHUNK_H, 
         CHUNK_D + voxelBufferPadding*2);
-    blockDefsCache = content->getIndices()->getBlockDefs();
+    blockDefsCache = content->getIndices()->blocks.getDefs();
 }
 
 BlocksRenderer::~BlocksRenderer() {
diff --git a/src/graphics/render/WorldRenderer.cpp b/src/graphics/render/WorldRenderer.cpp
index fdc5d82a..5d1c639b 100644
--- a/src/graphics/render/WorldRenderer.cpp
+++ b/src/graphics/render/WorldRenderer.cpp
@@ -179,7 +179,7 @@ void WorldRenderer::renderLevel(
     {
         auto inventory = player->getInventory();
         ItemStack& stack = inventory->getSlot(player->getChosenSlot());
-        auto item = indices->getItemDef(stack.getItemId());
+        auto item = indices->items.get(stack.getItemId());
         float multiplier = 0.5f;
         shader->uniform3f("u_torchlightColor",  
             item->emission[0] / 15.0f * multiplier,
@@ -202,11 +202,11 @@ void WorldRenderer::renderLevel(
     skybox->unbind();
 }
 
-void WorldRenderer::renderBlockSelection(Camera* camera, Shader* linesShader) {
+void WorldRenderer::renderBlockSelection() {
     const auto& selection = player->selection;
     auto indices = level->content->getIndices();
     blockid_t id = selection.vox.id;
-    auto block = indices->getBlockDef(id);
+    auto block = indices->blocks.get(id);
     const glm::ivec3 pos = player->selection.position;
     const glm::vec3 point = selection.hitPosition;
     const glm::vec3 norm = selection.normal;
@@ -230,7 +230,7 @@ void WorldRenderer::renderLines(Camera* camera, Shader* linesShader) {
     linesShader->use();
     linesShader->uniformMatrix("u_projview", camera->getProjView());
     if (player->selection.vox.id != BLOCK_VOID) {
-        renderBlockSelection(camera, linesShader);
+        renderBlockSelection();
     }
     if (player->debug) {
         level->entities->renderDebug(*lineBatch);
diff --git a/src/graphics/render/WorldRenderer.hpp b/src/graphics/render/WorldRenderer.hpp
index 1b58ea3f..31cb847c 100644
--- a/src/graphics/render/WorldRenderer.hpp
+++ b/src/graphics/render/WorldRenderer.hpp
@@ -45,10 +45,11 @@ class WorldRenderer {
     void drawChunks(Chunks* chunks, Camera* camera, Shader* shader);
 
     /// @brief Render block selection lines
+    void renderBlockSelection();
+    
+    /// @brief Render lines (selection and debug)
     /// @param camera active camera
     /// @param linesShader shader used
-    void renderBlockSelection(Camera* camera, Shader* linesShader);
-    
     void renderLines(Camera* camera, Shader* linesShader);
 
     /// @brief Render all debug lines (chunks borders, coord system guides)
diff --git a/src/graphics/ui/elements/InventoryView.cpp b/src/graphics/ui/elements/InventoryView.cpp
index 92084c37..de121327 100644
--- a/src/graphics/ui/elements/InventoryView.cpp
+++ b/src/graphics/ui/elements/InventoryView.cpp
@@ -121,7 +121,7 @@ void SlotView::draw(const DrawContext* pctx, Assets* assets) {
     itemid_t itemid = bound->getItemId();
     if (itemid != prevItem) {
         if (itemid) {
-            auto def = content->getIndices()->getItemDef(itemid);
+            auto def = content->getIndices()->items.get(itemid);
             tooltip = util::pascal_case(
                 langs::get(util::str2wstr_utf8(def->caption))
             );
@@ -159,12 +159,12 @@ void SlotView::draw(const DrawContext* pctx, Assets* assets) {
     auto previews = assets->get<Atlas>("block-previews");
     auto indices = content->getIndices();
 
-    ItemDef* item = indices->getItemDef(stack.getItemId());
+    ItemDef* item = indices->items.get(stack.getItemId());
     switch (item->iconType) {
         case item_icon_type::none:
             break;
         case item_icon_type::block: {
-            const Block& cblock = content->requireBlock(item->icon);
+            const Block& cblock = content->blocks.require(item->icon);
             batch->texture(previews->getTexture());
 
             UVRegion region = previews->get(cblock.name);
@@ -268,7 +268,7 @@ void SlotView::clicked(gui::GUI* gui, mousecode button) {
                 stack.setCount(halfremain);
             }
         } else {
-            auto stackDef = content->getIndices()->getItemDef(stack.getItemId());
+            auto stackDef = content->getIndices()->items.get(stack.getItemId());
             if (stack.isEmpty()) {
                 stack.set(grabbed);
                 stack.setCount(1);
diff --git a/src/items/ItemStack.cpp b/src/items/ItemStack.cpp
index c2c338e0..d60246c3 100644
--- a/src/items/ItemStack.cpp
+++ b/src/items/ItemStack.cpp
@@ -22,7 +22,7 @@ bool ItemStack::accepts(const ItemStack& other) const {
 }
 
 void ItemStack::move(ItemStack& item, const ContentIndices* indices) {
-    auto def = indices->getItemDef(item.getItemId());
+    auto def = indices->items.get(item.getItemId());
     int count = std::min(item.count, def->stackSize-this->count);
     if (isEmpty()) {
         set(ItemStack(item.getItemId(), count));
diff --git a/src/lighting/LightSolver.cpp b/src/lighting/LightSolver.cpp
index f9865956..d2df6b4b 100644
--- a/src/lighting/LightSolver.cpp
+++ b/src/lighting/LightSolver.cpp
@@ -81,7 +81,7 @@ void LightSolver::solve(){
 		}
 	}
 
-	const Block* const* blockDefs = contentIds->getBlockDefs();
+	const Block* const* blockDefs = contentIds->blocks.getDefs();
 	while (!addqueue.empty()){
 		const lightentry entry = addqueue.front();
 		addqueue.pop();
diff --git a/src/lighting/Lighting.cpp b/src/lighting/Lighting.cpp
index 99cf1fcc..6d2d5cc4 100644
--- a/src/lighting/Lighting.cpp
+++ b/src/lighting/Lighting.cpp
@@ -36,7 +36,7 @@ void Lighting::clear(){
 }
 
 void Lighting::prebuildSkyLight(Chunk* chunk, const ContentIndices* indices){
-    auto* blockDefs = indices->getBlockDefs();
+    const auto* blockDefs = indices->blocks.getDefs();
 
     int highestPoint = 0;
     for (int z = 0; z < CHUNK_D; z++){
@@ -60,7 +60,7 @@ void Lighting::prebuildSkyLight(Chunk* chunk, const ContentIndices* indices){
 }
 
 void Lighting::buildSkyLight(int cx, int cz){
-    const Block* const* blockDefs = content->getIndices()->getBlockDefs();
+    const auto blockDefs = content->getIndices()->blocks.getDefs();
 
     Chunk* chunk = chunks->getChunk(cx, cz);
     for (int z = 0; z < CHUNK_D; z++){
@@ -92,8 +92,8 @@ void Lighting::onChunkLoaded(int cx, int cz, bool expand){
     LightSolver* solverB = this->solverB.get();
     LightSolver* solverS = this->solverS.get();
 
-    const Block* const* blockDefs = content->getIndices()->getBlockDefs();
-    const Chunk* chunk = chunks->getChunk(cx, cz);
+    auto blockDefs = content->getIndices()->blocks.getDefs();
+    auto chunk = chunks->getChunk(cx, cz);
 
     for (uint y = 0; y < CHUNK_H; y++){
         for (uint z = 0; z < CHUNK_D; z++){
@@ -150,7 +150,7 @@ void Lighting::onChunkLoaded(int cx, int cz, bool expand){
 }
 
 void Lighting::onBlockSet(int x, int y, int z, blockid_t id){
-    Block* block = content->getIndices()->getBlockDef(id);
+    Block* block = content->getIndices()->blocks.get(id);
     solverR->remove(x,y,z);
     solverG->remove(x,y,z);
     solverB->remove(x,y,z);
diff --git a/src/logic/BlocksController.cpp b/src/logic/BlocksController.cpp
index 4748e7e3..95a3d47a 100644
--- a/src/logic/BlocksController.cpp
+++ b/src/logic/BlocksController.cpp
@@ -83,7 +83,7 @@ void BlocksController::updateBlock(int x, int y, int z) {
     voxel* vox = chunks->get(x, y, z);
     if (vox == nullptr)
         return;
-    const Block* def = level->content->getIndices()->getBlockDef(vox->id);
+    auto def = level->content->getIndices()->blocks.get(vox->id);
     if (def->grounded && !chunks->isSolidBlock(x, y-1, z)) {
         breakBlock(nullptr, def, x, y, z);
         return;
@@ -109,10 +109,10 @@ void BlocksController::onBlocksTick(int tickid, int parts) {
     auto content = level->content;
     auto indices = content->getIndices();
     int tickRate = blocksTickClock.getTickRate();
-    for (size_t id = 0; id < indices->countBlockDefs(); id++) {
+    for (size_t id = 0; id < indices->blocks.count(); id++) {
         if ((id + tickid) % parts != 0)
             continue;
-        auto def = indices->getBlockDef(id);
+        auto def = indices->blocks.get(id);
         auto interval = def->tickInterval;
         if (def->rt.funcsset.onblockstick && tickid / parts % interval == 0) {
             scripting::on_blocks_tick(def, tickRate / interval);
@@ -143,7 +143,7 @@ void BlocksController::randomTick(int tickid, int parts) {
                     int by = random.rand() % segheight + s * segheight;
                     int bz = random.rand() % CHUNK_D;
                     const voxel& vox = chunk->voxels[(by * CHUNK_D + bz) * CHUNK_W + bx];
-                    Block* block = indices->getBlockDef(vox.id);
+                    Block* block = indices->blocks.get(vox.id);
                     if (block->rt.funcsset.randupdate) {
                         scripting::random_update_block(
                             block, 
@@ -167,7 +167,7 @@ int64_t BlocksController::createBlockInventory(int x, int y, int z) {
     auto inv = chunk->getBlockInventory(lx, y, lz);
     if (inv == nullptr) {
         auto indices = level->content->getIndices();
-        auto def = indices->getBlockDef(chunk->voxels[vox_index(lx, y, lz)].id);
+        auto def = indices->blocks.get(chunk->voxels[vox_index(lx, y, lz)].id);
         int invsize = def->inventorySize;
         if (invsize == 0) {
             return 0;
diff --git a/src/logic/PlayerController.cpp b/src/logic/PlayerController.cpp
index a37128b8..ef680c56 100644
--- a/src/logic/PlayerController.cpp
+++ b/src/logic/PlayerController.cpp
@@ -203,7 +203,7 @@ void PlayerController::onFootstep() {
             int z = std::floor(pos.z+half.z*offsetZ);
             auto vox = level->chunks->get(x, y, z);
             if (vox) {
-                auto def = level->content->getIndices()->getBlockDef(vox->id);
+                auto def = level->content->getIndices()->blocks.get(vox->id);
                 if (!def->obstacle)
                     continue;
                 onBlockInteraction(
@@ -317,7 +317,7 @@ static int determine_rotation(Block* def, const glm::ivec3& norm, glm::vec3& cam
 }
 
 static void pick_block(ContentIndices* indices, Chunks* chunks, Player* player, int x, int y, int z) {
-    Block* block = indices->getBlockDef(chunks->get(x,y,z)->id);
+    auto block = indices->blocks.get(chunks->get(x,y,z)->id);
     itemid_t id = block->rt.pickingItem;
     auto inventory = player->getInventory();
     size_t slotid = inventory->findSlotByItem(id, 0, 10);
@@ -356,7 +356,7 @@ voxel* PlayerController::updateSelection(float maxDistance) {
     selection.actualPosition = iend;
     if (selectedState.segment) {
         selection.position = chunks->seekOrigin(
-            iend, indices->getBlockDef(selection.vox.id), selectedState
+            iend, indices->blocks.get(selection.vox.id), selectedState
         );
         auto origin = chunks->get(iend);
         if (origin && origin->id != vox->id) {
@@ -430,7 +430,7 @@ void PlayerController::updateInteraction() {
     
     auto inventory = player->getInventory();
     const ItemStack& stack = inventory->getSlot(player->getChosenSlot());
-    ItemDef* item = indices->getItemDef(stack.getItemId());
+    ItemDef* item = indices->items.get(stack.getItemId());
 
     auto vox = updateSelection(maxDistance);
     if (vox == nullptr) {
@@ -446,7 +446,7 @@ void PlayerController::updateInteraction() {
             return;
         }
     }
-    auto target = indices->getBlockDef(vox->id);
+    auto target = indices->blocks.get(vox->id);
     if (lclick && target->breakable){
         onBlockInteraction(
             iend, target,
@@ -467,7 +467,7 @@ void PlayerController::updateInteraction() {
             return;
         }
     }
-    auto def = indices->getBlockDef(item->rt.placingBlock);
+    auto def = indices->blocks.get(item->rt.placingBlock);
     if (def && rclick) {
         processRightClick(def, target);
     }
diff --git a/src/logic/scripting/lua/libblock.cpp b/src/logic/scripting/lua/libblock.cpp
index f992b32e..4f2b3902 100644
--- a/src/logic/scripting/lua/libblock.cpp
+++ b/src/logic/scripting/lua/libblock.cpp
@@ -14,10 +14,10 @@ using namespace scripting;
 static Block* require_block(lua::State* L) {
     auto indices = content->getIndices();
     auto id = lua::tointeger(L, 1);
-    if (static_cast<size_t>(id) >= indices->countBlockDefs()) {
+    if (static_cast<size_t>(id) >= indices->blocks.count()) {
         return nullptr;
     }
-    return indices->getBlockDef(id);
+    return indices->blocks.get(id);
 }
 
 static int l_name(lua::State* L) {
@@ -43,12 +43,12 @@ static int l_is_solid_at(lua::State* L) {
 }
 
 static int l_count(lua::State* L) {
-    return lua::pushinteger(L, indices->countBlockDefs());
+    return lua::pushinteger(L, indices->blocks.count());
 }
 
 static int l_index(lua::State* L) {
     auto name = lua::require_string(L, 1);
-    return lua::pushinteger(L, content->requireBlock(name).rt.id);
+    return lua::pushinteger(L, content->blocks.require(name).rt.id);
 }
 
 static int l_is_extended(lua::State* L) {
@@ -78,7 +78,7 @@ static int l_seek_origin(lua::State* L) {
     auto y = lua::tointeger(L, 2);
     auto z = lua::tointeger(L, 3);
     auto vox = level->chunks->get(x, y, z);
-    auto def = indices->getBlockDef(vox->id);
+    auto def = indices->blocks.get(vox->id);
     return lua::pushivec3(L, level->chunks->seekOrigin({x, y, z}, def, vox->state));
 }
 
@@ -89,7 +89,7 @@ static int l_set(lua::State* L) {
     auto id = lua::tointeger(L, 4);    
     auto state = lua::tointeger(L, 5);
     bool noupdate = lua::toboolean(L, 6);
-    if (static_cast<size_t>(id) >= indices->countBlockDefs()) {
+    if (static_cast<size_t>(id) >= indices->blocks.count()) {
         return 0;
     }
     if (!level->chunks->get(x, y, z)) {
@@ -120,7 +120,7 @@ static int l_get_x(lua::State* L) {
     if (vox == nullptr) {
         return lua::pushivec3(L, 1, 0, 0);
     }
-    auto def = level->content->getIndices()->getBlockDef(vox->id);
+    auto def = level->content->getIndices()->blocks.get(vox->id);
     if (!def->rotatable) {
         return lua::pushivec3(L, 1, 0, 0);
     } else {
@@ -137,7 +137,7 @@ static int l_get_y(lua::State* L) {
     if (vox == nullptr) {
         return lua::pushivec3(L, 0, 1, 0);
     }
-    auto def = level->content->getIndices()->getBlockDef(vox->id);
+    auto def = level->content->getIndices()->blocks.get(vox->id);
     if (!def->rotatable) {
         return lua::pushivec3(L, 0, 1, 0);
     } else {
@@ -154,7 +154,7 @@ static int l_get_z(lua::State* L) {
     if (vox == nullptr) {
         return lua::pushivec3(L, 0, 0, 1);
     }
-    auto def = level->content->getIndices()->getBlockDef(vox->id);
+    auto def = level->content->getIndices()->blocks.get(vox->id);
     if (!def->rotatable) {
         return lua::pushivec3(L, 0, 0, 1);
     } else {
diff --git a/src/logic/scripting/lua/libhud.cpp b/src/logic/scripting/lua/libhud.cpp
index 5395e7a1..b5731d1b 100644
--- a/src/logic/scripting/lua/libhud.cpp
+++ b/src/logic/scripting/lua/libhud.cpp
@@ -49,7 +49,7 @@ static int l_hud_open_block(lua::State* L) {
             std::to_string(x) + " " + std::to_string(y) + " " + std::to_string(z)
         );
     }
-    auto def = content->getIndices()->getBlockDef(vox->id);
+    auto def = content->getIndices()->blocks.get(vox->id);
     auto assets = engine->getAssets();
     auto layout = assets->get<UiDocument>(def->uiLayout);
     if (layout == nullptr) {
diff --git a/src/logic/scripting/lua/libinventory.cpp b/src/logic/scripting/lua/libinventory.cpp
index 549593a8..717583b6 100644
--- a/src/logic/scripting/lua/libinventory.cpp
+++ b/src/logic/scripting/lua/libinventory.cpp
@@ -9,7 +9,7 @@
 using namespace scripting;
 
 static void validate_itemid(itemid_t id) {
-    if (id >= indices->countItemDefs()) {
+    if (id >= indices->items.count()) {
         throw std::runtime_error("invalid item id");
     }
 }
diff --git a/src/logic/scripting/lua/libitem.cpp b/src/logic/scripting/lua/libitem.cpp
index 25466217..7f554301 100644
--- a/src/logic/scripting/lua/libitem.cpp
+++ b/src/logic/scripting/lua/libitem.cpp
@@ -8,30 +8,30 @@ using namespace scripting;
 static int l_item_name(lua::State* L) {
     auto indices = content->getIndices();
     auto id = lua::tointeger(L, 1);
-    if (static_cast<size_t>(id) >= indices->countItemDefs()) {
+    if (static_cast<size_t>(id) >= indices->items.count()) {
         return 0;
     }
-    auto def = indices->getItemDef(id);
+    auto def = indices->items.get(id);
     return lua::pushstring(L, def->name);
 }
 
 static int l_item_index(lua::State* L) {
     auto name = lua::require_string(L, 1);
-    return lua::pushinteger(L, content->requireItem(name).rt.id);
+    return lua::pushinteger(L, content->items.require(name).rt.id);
 }
 
 static int l_item_stack_size(lua::State* L) {
     auto indices = content->getIndices();
     auto id = lua::tointeger(L, 1);
-    if (static_cast<size_t>(id) >= indices->countItemDefs()) {
+    if (static_cast<size_t>(id) >= indices->items.count()) {
         return 0;
     }
-    auto def = indices->getItemDef(id);
+    auto def = indices->items.get(id);
     return lua::pushinteger(L, def->stackSize);
 }
 
 static int l_item_defs_count(lua::State* L) {
-    return lua::pushinteger(L, indices->countItemDefs());
+    return lua::pushinteger(L, indices->items.count());
 }
 
 const luaL_Reg itemlib [] = {
diff --git a/src/voxels/Chunks.cpp b/src/voxels/Chunks.cpp
index 4d530d90..9edc4e16 100644
--- a/src/voxels/Chunks.cpp
+++ b/src/voxels/Chunks.cpp
@@ -66,7 +66,7 @@ const AABB* Chunks::isObstacleAt(float x, float y, float z){
             return &empty;
         }
     }
-    const Block* def = indices->getBlockDef(v->id);
+    const auto def = indices->blocks.get(v->id);
     if (def->obstacle) {
         glm::ivec3 offset {};
         if (v->state.segment) {
@@ -89,21 +89,21 @@ bool Chunks::isSolidBlock(int32_t x, int32_t y, int32_t z) {
     voxel* v = get(x, y, z);
     if (v == nullptr)
         return false;
-    return indices->getBlockDef(v->id)->rt.solid;
+    return indices->blocks.get(v->id)->rt.solid;
 }
 
 bool Chunks::isReplaceableBlock(int32_t x, int32_t y, int32_t z) {
     voxel* v = get(x, y, z);
     if (v == nullptr)
         return false;
-    return indices->getBlockDef(v->id)->replaceable;
+    return indices->blocks.get(v->id)->replaceable;
 }
 
 bool Chunks::isObstacleBlock(int32_t x, int32_t y, int32_t z) {
     voxel* v = get(x, y, z);
     if (v == nullptr)
         return false;
-    return indices->getBlockDef(v->id)->obstacle;
+    return indices->blocks.get(v->id)->obstacle;
 }
 
 ubyte Chunks::getLight(int32_t x, int32_t y, int32_t z, int channel){
@@ -240,7 +240,7 @@ bool Chunks::checkReplaceability(const Block* def, blockstate state, glm::ivec3
                 pos += rotation.axisY * sy;
                 pos += rotation.axisZ * sz;
                 if (auto vox = get(pos.x, pos.y, pos.z)) {
-                    auto target = indices->getBlockDef(vox->id);
+                    auto target = indices->blocks.get(vox->id);
                     if (!target->replaceable && vox->id != ignore) {
                         return false;
                     }
@@ -316,7 +316,7 @@ void Chunks::setRotation(int32_t x, int32_t y, int32_t z, uint8_t index) {
     if (vox == nullptr) {
         return;
     }
-    auto def = indices->getBlockDef(vox->id);
+    auto def = indices->blocks.get(vox->id);
     if (!def->rotatable || vox->state.rotation == index) {
         return;
     }
@@ -351,7 +351,7 @@ void Chunks::set(int32_t x, int32_t y, int32_t z, uint32_t id, blockstate state)
     
     // block finalization
     voxel& vox = chunk->voxels[(y * CHUNK_D + lz) * CHUNK_W + lx]; 
-    auto prevdef = indices->getBlockDef(vox.id);
+    auto prevdef = indices->blocks.get(vox.id);
     if (prevdef->inventorySize == 0) {
         chunk->removeBlockInventory(lx, y, lz);
     }
@@ -360,7 +360,7 @@ void Chunks::set(int32_t x, int32_t y, int32_t z, uint32_t id, blockstate state)
     }
 
     // block initialization
-    auto newdef = indices->getBlockDef(id);
+    auto newdef = indices->blocks.get(id);
     vox.id = id;
     vox.state = state;
     chunk->setModifiedAndUnsaved();
@@ -429,7 +429,7 @@ voxel* Chunks::rayCast(
         if (voxel == nullptr){
             return nullptr;
         }
-        const auto def = indices->getBlockDef(voxel->id);
+        const auto def = indices->blocks.get(voxel->id);
         if (def->selectable){
             end.x = px + t * dx;
             end.y = py + t * dy;
@@ -553,7 +553,7 @@ glm::vec3 Chunks::rayCastToObstacle(glm::vec3 start, glm::vec3 dir, float maxDis
         if (voxel == nullptr) { 
             return glm::vec3(px + t * dx, py + t * dy, pz + t * dz); 
         }
-        const auto def = indices->getBlockDef(voxel->id);
+        const auto def = indices->blocks.get(voxel->id);
         if (def->obstacle) {
             if (!def->rt.solid) {
                 const std::vector<AABB>& hitboxes = def->rotatable
diff --git a/src/voxels/ChunksStorage.cpp b/src/voxels/ChunksStorage.cpp
index 1ffb2b03..73b690af 100644
--- a/src/voxels/ChunksStorage.cpp
+++ b/src/voxels/ChunksStorage.cpp
@@ -40,7 +40,7 @@ void ChunksStorage::remove(int x, int z) {
 static void verifyLoadedChunk(ContentIndices* indices, Chunk* chunk) {
     for (size_t i = 0; i < CHUNK_VOL; i++) {
         blockid_t id = chunk->voxels[i].id;
-        if (indices->getBlockDef(id) == nullptr) {
+        if (indices->blocks.get(id) == nullptr) {
             auto logline = logger.error();
             logline << "corruped block detected at " << i << " of chunk ";
             logline << chunk->x << "x" << chunk->z;
@@ -79,6 +79,7 @@ std::shared_ptr<Chunk> ChunksStorage::create(int x, int z) {
 }
 
 // reduce nesting on next modification
+// 25.06.2024: not now
 void ChunksStorage::getVoxels(VoxelsVolume* volume, bool backlight) const {
 	const Content* content = level->content;
 	auto indices = content->getIndices();
@@ -137,7 +138,7 @@ void ChunksStorage::getVoxels(VoxelsVolume* volume, bool backlight) const {
 							voxels[vidx] = cvoxels[cidx];
 							light_t light = clights[cidx];
 							if (backlight) {
-								const Block* block = indices->getBlockDef(voxels[vidx].id);
+								auto block = indices->blocks.get(voxels[vidx].id);
 								if (block->lightPassing) {
 									light = Lightmap::combine(
 										min(15, Lightmap::extract(light, 0)+1),
diff --git a/src/voxels/WorldGenerator.cpp b/src/voxels/WorldGenerator.cpp
index a893ba7d..9bcccdeb 100644
--- a/src/voxels/WorldGenerator.cpp
+++ b/src/voxels/WorldGenerator.cpp
@@ -6,13 +6,13 @@
 #include "../content/Content.hpp"
 
 WorldGenerator::WorldGenerator(const Content* content)
-  : idStone(content->requireBlock("base:stone").rt.id),
-    idDirt(content->requireBlock("base:dirt").rt.id),
-    idGrassBlock(content->requireBlock("base:grass_block").rt.id),
-    idSand(content->requireBlock("base:sand").rt.id),
-    idWater(content->requireBlock("base:water").rt.id),
-    idWood(content->requireBlock("base:wood").rt.id),
-    idLeaves(content->requireBlock("base:leaves").rt.id),
-    idGrass(content->requireBlock("base:grass").rt.id),
-    idFlower(content->requireBlock("base:flower").rt.id),
-    idBazalt(content->requireBlock("base:bazalt").rt.id) {}
+  : idStone(content->blocks.require("base:stone").rt.id),
+    idDirt(content->blocks.require("base:dirt").rt.id),
+    idGrassBlock(content->blocks.require("base:grass_block").rt.id),
+    idSand(content->blocks.require("base:sand").rt.id),
+    idWater(content->blocks.require("base:water").rt.id),
+    idWood(content->blocks.require("base:wood").rt.id),
+    idLeaves(content->blocks.require("base:leaves").rt.id),
+    idGrass(content->blocks.require("base:grass").rt.id),
+    idFlower(content->blocks.require("base:flower").rt.id),
+    idBazalt(content->blocks.require("base:bazalt").rt.id) {}