[Home](./index.md) > [server](./server.md) > [ChunkLattice](./server.chunklattice.md) > [initializeBlocks](./server.chunklattice.initializeblocks.md) ## ChunkLattice.initializeBlocks() method Initializes all blocks in the lattice in bulk, replacing existing blocks. Use for: loading maps or generating terrain in one pass. Do NOT use for: incremental edits; use `ChunkLattice.setBlock`. **Signature:** ```typescript initializeBlocks(blocks: { [blockTypeId: number]: BlockPlacement[]; }): void; ``` ## Parameters

Parameter	Type	Description
blocks	{ \[blockTypeId: number\]: [BlockPlacement](./server.blockplacement.md)\[\]; }	The blocks to initialize, keyed by block type ID. \*\*Side effects:\*\* Clears existing data, creates colliders, and emits `ChunkLatticeEvent.SET_BLOCK` per block. \*\*Category:\*\* Blocks

**Returns:** void ## Remarks \*\*Clears first:\*\* Calls `ChunkLattice.clear` before initializing, removing all existing blocks and colliders. \*\*Collider optimization:\*\* Creates one collider per block type with all placements combined. Voxel colliders have their states combined for efficient neighbor collision detection.