take simple screenshots in Unity3D

EditorScreenshotTaker.cs

using UnityEngine;
using System.Collections;

// @kurtdekker
// drop it in a scene somewhere or else call PossiblyAttach(),
// in which case it only attaches in the editor.

public class EditorScreenshotTaker : MonoBehaviour
{
	static bool tried;

	public static void PossiblyAttach()
	{
		if (tried) return;
		tried = true;
		if (Application.isEditor)
		{
			EditorScreenshotTaker est = new GameObject(
				"EditorScreenshotTaker().PossiblyAttach();").
				AddComponent<EditorScreenshotTaker>();
			DontDestroyOnLoad( est.gameObject);
		}
	}

	void Update ()
	{
		if (Input.GetKeyDown( KeyCode.BackQuote))
		{
			string filename = System.String.Format(
				// replace this path with where you want it to go:
				"/Users/kurt/Desktop/" +
				// and replace this if you want something else
				"Screenshot-Hovercar-{0}.png", System.DateTime.Now.ToFileTime());
			Debug.Log ( filename);
			ScreenCapture.CaptureScreenshot( filename);
		}
	}
}