diff --git a/src/logic/scripting/lua/libs/libblock.cpp b/src/logic/scripting/lua/libs/libblock.cpp
index 5d681e5f..e454903c 100644
--- a/src/logic/scripting/lua/libs/libblock.cpp
+++ b/src/logic/scripting/lua/libs/libblock.cpp
@@ -98,7 +98,7 @@ static int l_set(lua::State* L) {
     if (!level->chunks->get(x, y, z)) {
         return 0;
     }
-    level->chunks->set(x, y, z, id, int2blockstate(state));
+    blocks_agent::set(*level->chunksStorage, x, y, z, id, int2blockstate(state));
     level->lighting->onBlockSet(x, y, z, id);
     if (!noupdate) {
         blocks->updateSides(x, y, z);
@@ -269,7 +269,9 @@ static int l_is_replaceable_at(lua::State* L) {
     auto x = lua::tointeger(L, 1);
     auto y = lua::tointeger(L, 2);
     auto z = lua::tointeger(L, 3);
-    return lua::pushboolean(L, level->chunks->isReplaceableBlock(x, y, z));
+    return lua::pushboolean(
+        L, blocks_agent::is_replaceable_at(*level->chunksStorage, x, y, z)
+    );
 }
 
 static int l_caption(lua::State* L) {
diff --git a/src/voxels/Chunks.cpp b/src/voxels/Chunks.cpp
index 8bfe6166..50812d07 100644
--- a/src/voxels/Chunks.cpp
+++ b/src/voxels/Chunks.cpp
@@ -89,9 +89,7 @@ bool Chunks::isSolidBlock(int32_t x, int32_t y, int32_t z) {
 }
 
 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->blocks.require(v->id).replaceable;
+    return blocks_agent::is_replaceable_at(*this, x, y, z);
 }
 
 bool Chunks::isObstacleBlock(int32_t x, int32_t y, int32_t z) {
@@ -184,50 +182,13 @@ glm::ivec3 Chunks::seekOrigin(
 void Chunks::eraseSegments(
     const Block& def, blockstate state, int x, int y, int z
 ) {
-    const auto& rotation = def.rotations.variants[state.rotation];
-    for (int sy = 0; sy < def.size.y; sy++) {
-        for (int sz = 0; sz < def.size.z; sz++) {
-            for (int sx = 0; sx < def.size.x; sx++) {
-                if ((sx | sy | sz) == 0) {
-                    continue;
-                }
-                glm::ivec3 pos(x, y, z);
-                pos += rotation.axisX * sx;
-                pos += rotation.axisY * sy;
-                pos += rotation.axisZ * sz;
-                set(pos.x, pos.y, pos.z, 0, {});
-            }
-        }
-    }
-}
-
-static constexpr uint8_t segment_to_int(int sx, int sy, int sz) {
-    return ((sx > 0) | ((sy > 0) << 1) | ((sz > 0) << 2));
+    blocks_agent::erase_segments(*this, def, state, x, y, z);
 }
 
 void Chunks::repairSegments(
     const Block& def, blockstate state, int x, int y, int z
 ) {
-    const auto& rotation = def.rotations.variants[state.rotation];
-    const auto id = def.rt.id;
-    const auto size = def.size;
-    for (int sy = 0; sy < size.y; sy++) {
-        for (int sz = 0; sz < size.z; sz++) {
-            for (int sx = 0; sx < size.x; sx++) {
-                if ((sx | sy | sz) == 0) {
-                    continue;
-                }
-                blockstate segState = state;
-                segState.segment = segment_to_int(sx, sy, sz);
-
-                glm::ivec3 pos(x, y, z);
-                pos += rotation.axisX * sx;
-                pos += rotation.axisY * sy;
-                pos += rotation.axisZ * sz;
-                set(pos.x, pos.y, pos.z, id, segState);
-            }
-        }
-    }
+    blocks_agent::repair_segments(*this, def, state, x, y, z);
 }
 
 bool Chunks::checkReplaceability(
@@ -283,7 +244,7 @@ void Chunks::setRotationExtended(
                 pos += rotation.axisZ * sz;
 
                 blockstate segState = newstate;
-                segState.segment = segment_to_int(sx, sy, sz);
+                segState.segment = blocks_agent::segment_to_int(sx, sy, sz);
 
                 auto vox = get(pos);
                 // checked for nullptr by checkReplaceability
@@ -344,68 +305,7 @@ void Chunks::setRotation(int32_t x, int32_t y, int32_t z, uint8_t index) {
 void Chunks::set(
     int32_t x, int32_t y, int32_t z, uint32_t id, blockstate state
 ) {
-    if (y < 0 || y >= CHUNK_H) {
-        return;
-    }
-    int cx = floordiv<CHUNK_W>(x);
-    int cz = floordiv<CHUNK_D>(z);
-    auto ptr = areaMap.getIf(cx, cz);
-    if (ptr == nullptr) {
-        return;
-    }
-    Chunk* chunk = ptr->get();
-    if (chunk == nullptr) {
-        return;
-    }
-    int lx = x - cx * CHUNK_W;
-    int lz = z - cz * CHUNK_D;
-    size_t index = vox_index(lx, y, lz);
-
-    // block finalization
-    voxel& vox = chunk->voxels[(y * CHUNK_D + lz) * CHUNK_W + lx];
-    const auto& prevdef = indices->blocks.require(vox.id);
-    if (prevdef.inventorySize != 0) {
-        chunk->removeBlockInventory(lx, y, lz);
-    }
-    if (prevdef.rt.extended && !vox.state.segment) {
-        eraseSegments(prevdef, vox.state, x, y, z);
-    }
-    if (prevdef.dataStruct) {
-        if (auto found = chunk->blocksMetadata.find(index)) {
-            chunk->blocksMetadata.free(found);
-            chunk->flags.unsaved = true;
-            chunk->flags.blocksData = true;
-        }
-    }
-
-    // block initialization
-    const auto& newdef = indices->blocks.require(id);
-    vox.id = id;
-    vox.state = state;
-    chunk->setModifiedAndUnsaved();
-    if (!state.segment && newdef.rt.extended) {
-        repairSegments(newdef, state, x, y, z);
-    }
-
-    if (y < chunk->bottom)
-        chunk->bottom = y;
-    else if (y + 1 > chunk->top)
-        chunk->top = y + 1;
-    else if (id == 0)
-        chunk->updateHeights();
-
-    if (lx == 0 && (chunk = getChunk(cx - 1, cz))) {
-        chunk->flags.modified = true;
-    }
-    if (lz == 0 && (chunk = getChunk(cx, cz - 1))) {
-        chunk->flags.modified = true;
-    }
-    if (lx == CHUNK_W - 1 && (chunk = getChunk(cx + 1, cz))) {
-        chunk->flags.modified = true;
-    }
-    if (lz == CHUNK_D - 1 && (chunk = getChunk(cx, cz + 1))) {
-        chunk->flags.modified = true;
-    }
+    blocks_agent::set(*this, x, y, z, id, state);
 }
 
 voxel* Chunks::rayCast(
@@ -652,6 +552,7 @@ void Chunks::resize(uint32_t newW, uint32_t newD) {
 
 bool Chunks::putChunk(const std::shared_ptr<Chunk>& chunk) {
     if (areaMap.set(chunk->x, chunk->z, chunk)) {
+        if (level)
         level->events->trigger(LevelEventType::EVT_CHUNK_SHOWN, chunk.get());
         return true;
     }
diff --git a/src/voxels/GlobalChunks.cpp b/src/voxels/GlobalChunks.cpp
index 38843398..98a2d40a 100644
--- a/src/voxels/GlobalChunks.cpp
+++ b/src/voxels/GlobalChunks.cpp
@@ -16,16 +16,6 @@
 #include "Block.hpp"
 #include "Chunk.hpp"
 
-inline uint64_t keyfrom(int32_t x, int32_t z) {
-    union {
-        int32_t pos[2];
-        uint64_t key;
-    } ekey;
-    ekey.pos[0] = x;
-    ekey.pos[1] = z;
-    return ekey.key;
-}
-
 static debug::Logger logger("chunks-storage");
 
 GlobalChunks::GlobalChunks(Level* level)
@@ -208,11 +198,3 @@ void GlobalChunks::saveAll() {
 void GlobalChunks::putChunk(std::shared_ptr<Chunk> chunk) {
     chunksMap[keyfrom(chunk->x, chunk->z)] = std::move(chunk);
 }
-
-Chunk* GlobalChunks::getChunk(int cx, int cz) const {
-    const auto& found = chunksMap.find(keyfrom(cx, cz));
-    if (found == chunksMap.end()) {
-        return nullptr;
-    }
-    return found->second.get();
-}
diff --git a/src/voxels/GlobalChunks.hpp b/src/voxels/GlobalChunks.hpp
index f7ce0e92..afbdf67c 100644
--- a/src/voxels/GlobalChunks.hpp
+++ b/src/voxels/GlobalChunks.hpp
@@ -14,6 +14,16 @@ class Level;
 class ContentIndices;
 
 class GlobalChunks {
+    static inline uint64_t keyfrom(int32_t x, int32_t z) {
+        union {
+            int32_t pos[2];
+            uint64_t key;
+        } ekey;
+        ekey.pos[0] = x;
+        ekey.pos[1] = z;
+        return ekey.key;
+    }
+
     Level* level;
     const ContentIndices* indices;
     std::unordered_map<uint64_t, std::shared_ptr<Chunk>> chunksMap;
@@ -41,7 +51,13 @@ public:
 
     void putChunk(std::shared_ptr<Chunk> chunk);
 
-    Chunk* getChunk(int cx, int cz) const;
+    inline Chunk* getChunk(int cx, int cz) const {
+        const auto& found = chunksMap.find(keyfrom(cx, cz));
+        if (found == chunksMap.end()) {
+            return nullptr;
+        }
+        return found->second.get();
+    }
 
     const ContentIndices& getContentIndices() const {
         return *indices;
diff --git a/src/voxels/blocks_agent.cpp b/src/voxels/blocks_agent.cpp
new file mode 100644
index 00000000..53cef38d
--- /dev/null
+++ b/src/voxels/blocks_agent.cpp
@@ -0,0 +1,95 @@
+#include "blocks_agent.hpp"
+
+using namespace blocks_agent;
+
+template <class Storage>
+static inline void set_block(
+    Storage& chunks,
+    int32_t x,
+    int32_t y,
+    int32_t z,
+    uint32_t id,
+    blockstate state
+) {
+    if (y < 0 || y >= CHUNK_H) {
+        return;
+    }
+    const auto& indices = chunks.getContentIndices();
+    int cx = floordiv<CHUNK_W>(x);
+    int cz = floordiv<CHUNK_D>(z);
+    Chunk* chunk = get_chunk(chunks, cx, cz);
+    if (chunk == nullptr) {
+        return;
+    }
+    int lx = x - cx * CHUNK_W;
+    int lz = z - cz * CHUNK_D;
+    size_t index = vox_index(lx, y, lz);
+
+    // block finalization
+    voxel& vox = chunk->voxels[(y * CHUNK_D + lz) * CHUNK_W + lx];
+    const auto& prevdef = indices.blocks.require(vox.id);
+    if (prevdef.inventorySize != 0) {
+        chunk->removeBlockInventory(lx, y, lz);
+    }
+    if (prevdef.rt.extended && !vox.state.segment) {
+        erase_segments(chunks, prevdef, vox.state, x, y, z);
+    }
+    if (prevdef.dataStruct) {
+        if (auto found = chunk->blocksMetadata.find(index)) {
+            chunk->blocksMetadata.free(found);
+            chunk->flags.unsaved = true;
+            chunk->flags.blocksData = true;
+        }
+    }
+
+    // block initialization
+    const auto& newdef = indices.blocks.require(id);
+    vox.id = id;
+    vox.state = state;
+    chunk->setModifiedAndUnsaved();
+    if (!state.segment && newdef.rt.extended) {
+        repair_segments(chunks, newdef, state, x, y, z);
+    }
+
+    if (y < chunk->bottom)
+        chunk->bottom = y;
+    else if (y + 1 > chunk->top)
+        chunk->top = y + 1;
+    else if (id == 0)
+        chunk->updateHeights();
+
+    if (lx == 0 && (chunk = get_chunk(chunks, cx - 1, cz))) {
+        chunk->flags.modified = true;
+    }
+    if (lz == 0 && (chunk = get_chunk(chunks, cx, cz - 1))) {
+        chunk->flags.modified = true;
+    }
+    if (lx == CHUNK_W - 1 && (chunk = get_chunk(chunks, cx + 1, cz))) {
+        chunk->flags.modified = true;
+    }
+    if (lz == CHUNK_D - 1 && (chunk = get_chunk(chunks, cx, cz + 1))) {
+        chunk->flags.modified = true;
+    }
+}
+
+void blocks_agent::set(
+    Chunks& chunks,
+    int32_t x,
+    int32_t y,
+    int32_t z,
+    uint32_t id,
+    blockstate state
+) {
+    set_block(chunks, x, y, z, id, state);
+}
+
+void blocks_agent::set(
+    GlobalChunks& chunks,
+    int32_t x,
+    int32_t y,
+    int32_t z,
+    uint32_t id,
+    blockstate state
+) {
+    set_block(chunks, x, y, z, id, state);
+}
diff --git a/src/voxels/blocks_agent.hpp b/src/voxels/blocks_agent.hpp
index 31ae79c5..22850f40 100644
--- a/src/voxels/blocks_agent.hpp
+++ b/src/voxels/blocks_agent.hpp
@@ -1,12 +1,16 @@
 #pragma once
 
 #include "voxel.hpp"
+#include "Block.hpp"
+#include "Chunk.hpp"
+#include "Chunks.hpp"
+#include "GlobalChunks.hpp"
+#include "constants.hpp"
 #include "typedefs.hpp"
+#include "content/Content.hpp"
 #include "maths/voxmaths.hpp"
 
-class Chunk;
-class Chunks;
-class GlobalChunks;
+#include <stdexcept>
 
 /// Using templates to minimize OOP overhead
 
@@ -55,4 +59,81 @@ inline bool is_solid_at(const Storage& chunks, int32_t x, int32_t y, int32_t z)
     return false;
 }
 
+template<class Storage>
+inline bool is_replaceable_at(const Storage& chunks, int32_t x, int32_t y, int32_t z) {
+    if (auto vox = get(chunks, x, y, z)) {
+        return get_block_def(chunks, vox->id).replaceable;
+    }
+    return false;
+}
+
+void set(
+    Chunks& chunks,
+    int32_t x,
+    int32_t y,
+    int32_t z,
+    uint32_t id,
+    blockstate state
+);
+
+void set(
+    GlobalChunks& chunks,
+    int32_t x,
+    int32_t y,
+    int32_t z,
+    uint32_t id,
+    blockstate state
+);
+
+template<class Storage>
+inline void erase_segments(
+    Storage& chunks, const Block& def, blockstate state, int x, int y, int z
+) {
+    const auto& rotation = def.rotations.variants[state.rotation];
+    for (int sy = 0; sy < def.size.y; sy++) {
+        for (int sz = 0; sz < def.size.z; sz++) {
+            for (int sx = 0; sx < def.size.x; sx++) {
+                if ((sx | sy | sz) == 0) {
+                    continue;
+                }
+                glm::ivec3 pos(x, y, z);
+                pos += rotation.axisX * sx;
+                pos += rotation.axisY * sy;
+                pos += rotation.axisZ * sz;
+                set(chunks, pos.x, pos.y, pos.z, 0, {});
+            }
+        }
+    }
+}
+
+static constexpr uint8_t segment_to_int(int sx, int sy, int sz) {
+    return ((sx > 0) | ((sy > 0) << 1) | ((sz > 0) << 2));
+}
+
+template <class Storage>
+inline void repair_segments(
+    Storage& chunks, const Block& def, blockstate state, int x, int y, int z
+) {
+    const auto& rotation = def.rotations.variants[state.rotation];
+    const auto id = def.rt.id;
+    const auto size = def.size;
+    for (int sy = 0; sy < size.y; sy++) {
+        for (int sz = 0; sz < size.z; sz++) {
+            for (int sx = 0; sx < size.x; sx++) {
+                if ((sx | sy | sz) == 0) {
+                    continue;
+                }
+                blockstate segState = state;
+                segState.segment = segment_to_int(sx, sy, sz);
+
+                glm::ivec3 pos(x, y, z);
+                pos += rotation.axisX * sx;
+                pos += rotation.axisY * sy;
+                pos += rotation.axisZ * sz;
+                set(chunks, pos.x, pos.y, pos.z, id, segState);
+            }
+        }
+    }
+}
+
 } // blocks_agent
diff --git a/src/world/generator/WorldGenerator.cpp b/src/world/generator/WorldGenerator.cpp
index bc851a07..281ac411 100644
--- a/src/world/generator/WorldGenerator.cpp
+++ b/src/world/generator/WorldGenerator.cpp
@@ -189,10 +189,10 @@ void WorldGenerator::placeLine(const LinePlacement& line, int priority) {
     aabb.fix();
     aabb.a -= line.radius;
     aabb.b += line.radius;
-    int cxa = floordiv(aabb.a.x, CHUNK_W);
-    int cza = floordiv(aabb.a.z, CHUNK_D);
-    int cxb = floordiv(aabb.b.x, CHUNK_W);
-    int czb = floordiv(aabb.b.z, CHUNK_D);
+    int cxa = floordiv<CHUNK_W>(aabb.a.x);
+    int cza = floordiv<CHUNK_D>(aabb.a.z);
+    int cxb = floordiv<CHUNK_W>(aabb.b.x);
+    int czb = floordiv<CHUNK_D>(aabb.b.z);
     for (int cz = cza; cz <= czb; cz++) {
         for (int cx = cxa; cx <= cxb; cx++) {
             const auto& found = prototypes.find({cx, cz});