can be useful... for something  

using UnityEngine;
using HutongGames.PlayMaker;
[ActionCategory("Texture")]
[Tooltip("Get the size in pixel of a texture")]
public class GetTextureSize : FsmStateAction
{
	[RequiredField]
	public FsmTexture targetTexture;
	public FsmInt storedWidth;
	public FsmInt storedHeight;
	
	public override void Reset ()
	{
		targetTexture = null;
		storedWidth = null;
		storedHeight = null;
	}
	
	public override void OnEnter ()
	{
		DoGetTextureSize();
		Finish();
	}
	
	void DoGetTextureSize()
	{
		if(targetTexture.IsNone)
			return;
		
		storedWidth.Value = targetTexture.Value.width;
		storedHeight.Value = targetTexture.Value.height;
	}
}