public void setMetadata(int x, int y, int z, int meta) { 
		if(x >= width || x < 0 || y >= height || y < 0 || z < 0 || z >= 10) return;	
		
		int oldMeta = this.meta[x][y][z];
		this.meta[x][y][z] = meta;	
		
		if(oldMeta != meta)
			updateNeighbours(x, y, TileUpdateType.metaChange);
	}