Three.JS Isometric grid

// Create ThreeJS scene
var scene = new THREE.Scene();

var fog = new THREE.FogExp2(0xffffff, 0.03);
scene.fog = fog;

// Temp world map data
var worldData = {
	numRows: 32,
	numCols: 32,
	tiles:   []
};

var GAME_W = window.innerWidth,
		GAME_H = window.innerHeight,
		FOV    = 30,
		RENDER_NEAR_PLANE = 1,
		RENDER_FAR_PLANE  = 1000;

// Add camera
var camera = new THREE.PerspectiveCamera(FOV, GAME_W / GAME_H, RENDER_NEAR_PLANE, RENDER_FAR_PLANE);
camera.position.set(6, -6, 8);
camera.rotation.set(50 * Math.PI / 180, 0, 0);

// Create canvas and renderer
var gameCanvas = document.getElementById('game-canvas');
var renderer = new THREE.WebGLRenderer({ canvas: gameCanvas, antialias: false });
// Set the background color of the renderer to black, with full opacity
renderer.setClearColor(0x2A5263, 1);
renderer.setSize(GAME_W, GAME_H);

// Generate isometric world...
var TILE_W = 1, TILE_W_HALF = TILE_W / 2;

for(var y = 0; y < worldData.numRows; y++) {

	var offsetX = 0;

	// If row is odd
	if(y % 2 !== 0) {
		offsetX = TILE_W_HALF + TILE_W_HALF * 0.4;
	}

	for(var x = 0; x < worldData.numCols; x++) {

		var geometry = new THREE.BufferGeometry();
		var vertexPositions = [
			[-TILE_W/2, -TILE_W/2,  TILE_W/2],
			[ TILE_W/2, -TILE_W/2,  TILE_W/2],
			[ TILE_W/2,  TILE_W/2,  TILE_W/2],

			[ TILE_W/2,  TILE_W/2,  TILE_W/2],
			[-TILE_W/2,  TILE_W/2,  TILE_W/2],
			[-TILE_W/2, -TILE_W/2,  TILE_W/2]
		];
		var vertices = new Float32Array(vertexPositions.length * 3); // three components per vertex

		for (var i = 0; i < vertexPositions.length; i++) {
			vertices[i*3 + 0] = vertexPositions[i][0];
			vertices[i*3 + 1] = vertexPositions[i][1];
			vertices[i*3 + 2] = vertexPositions[i][2];
		}

		geometry.addAttribute('position', new THREE.BufferAttribute( vertices, 3 ));
		var tileXPos = x * TILE_W + offsetX + (TILE_W * 0.4 * x),
				tileYPos = y * TILE_W - (TILE_W_HALF * 0.6 * y);

		var texture = THREE.ImageUtils.loadTexture("img/square.png");
		var material = new THREE.MeshBasicMaterial({map: texture, wireframe: true });
		material.shading = THREE.FlatShading;
		geometry.computeVertexNormals();
		var tilePlane = new THREE.Mesh(geometry, material);

		tilePlane.position.set(tileXPos, tileYPos, 0);
		tilePlane.rotation.z = 45 * Math.PI / 180;

		scene.add(tilePlane);
	}
}