diff --git a/src/voxels/Chunks.cpp b/src/voxels/Chunks.cpp
index 61c70058..413cab85 100644
--- a/src/voxels/Chunks.cpp
+++ b/src/voxels/Chunks.cpp
@@ -158,8 +158,9 @@ Chunk* Chunks::getChunkByVoxel(int32_t x, int32_t y, int32_t z) {
 Chunk* Chunks::getChunk(int x, int z){
     x -= ox;
     z -= oz;
-    if (x < 0 || z < 0 || x >= int(w) || z >= int(d))
+    if (x < 0 || z < 0 || x >= static_cast<int>(w) || z >= static_cast<int>(d)) {
         return nullptr;
+    }
     return chunks[z * w + x].get();
 }
 
diff --git a/src/voxels/Chunks.hpp b/src/voxels/Chunks.hpp
index 54b20b29..fb8185d4 100644
--- a/src/voxels/Chunks.hpp
+++ b/src/voxels/Chunks.hpp
@@ -41,7 +41,6 @@ public:
            WorldFiles* worldFiles, LevelEvents* events, const Content* content);
     ~Chunks() = default;
 
-    bool checkReplaceability(const Block* def, blockstate state, glm::ivec3 coord, blockid_t ignore=0);
     bool putChunk(const std::shared_ptr<Chunk>& chunk);
 
     Chunk* getChunk(int32_t x, int32_t z);
@@ -55,7 +54,21 @@ public:
     light_t getLight(int32_t x, int32_t y, int32_t z);
     ubyte getLight(int32_t x, int32_t y, int32_t z, int channel);
     void set(int32_t x, int32_t y, int32_t z, uint32_t id, blockstate state);
+
+    /// @brief Seek for the extended block origin position
+    /// @param pos segment block position
+    /// @param def segment block definition
+    /// @param state segment block state
+    /// @return origin block position or `pos` if block is not extended
     glm::ivec3 seekOrigin(glm::ivec3 pos, const Block* def, blockstate state);
+
+    /// @brief Check if required zone is replaceable
+    /// @param def definition of the block that requires a replaceable zone
+    /// @param state the block state
+    /// @param coord position of the zone start
+    /// @param ignore ignored block id (will be counted as replaceable)
+    bool checkReplaceability(const Block* def, blockstate state, glm::ivec3 coord, blockid_t ignore=0);
+
     void setRotation(int32_t x, int32_t y, int32_t z, uint8_t rotation);
 
     voxel* rayCast(