create volume texure

using UnityEngine;
using System.Collections;

public class CreateVolumeLightTex : MonoBehaviour {

	public Texture2D input2DTex = null;
	public Texture3D volumeTex = null;
	private int resX = 64;
	private int resY = 64;
	private int resZ = 64;
	private Rect sourceRect;
	Color[] pix;


  void Awake () {

		pix = input2DTex.GetPixels (0, 0, 8192, resZ);

		//This is 24 bit, not 32 bit.。It will need texture combert as 24 bit.//
		volumeTex = new Texture3D (resX, resY, resZ, TextureFormat.RGB24, false);
		var colors = new Color[resX*resY*resZ];
		int idx = 0;
		Color c = Color.white;


		for(int z = 0; z < resZ; ++z)
		{
			for(int y = 0; y < resY; ++y)
			{
				for(int x = 0; x < resX; ++x, ++idx)
				{
					colors[idx] = pix[idx];
				}
			}
		}

		volumeTex.SetPixels (colors);
		volumeTex.Apply();
	}
}