Screenshot сontroller for Unity3D.

ScreenshotController.cs

// Vladimir Sigalkin (ExT)

using UnityEngine;

using System;
using System.IO;

public class ScreenshotController : MonoBehaviour
{
    public KeyCode Key = KeyCode.A;

    public int Width = 1920;
    public int Height = 1080;

    public Camera[] Cameras;

    public string DefaultFolderPath = "./Screenshots/";

    void Update()
    {
        if (Input.GetKeyDown(Key))
        {
            var fileName = ScreenshotName(DefaultFolderPath, Width, Height);
            MakeScreenshot(fileName, Width, Height, Cameras);
        }
    }

    public static void MakeScreenshot(string fileName, int width, int height, Camera[] cameras)
    {
        var renderTexture = new RenderTexture(width, height, 24);
        var screenshotTexture = new Texture2D(width, height, TextureFormat.ARGB32, false);

        foreach (var camera in cameras)
        {
	    var tempRender = camera.targetTexture;
	
            camera.targetTexture = renderTexture;
            camera.Render();

            RenderTexture.active = renderTexture;
            screenshotTexture.ReadPixels(new Rect(0, 0, width, height), 0, 0);
            camera.targetTexture = tempRender;
            RenderTexture.active = null;

            Destroy(renderTexture);
        }

        File.WriteAllBytes(fileName, screenshotTexture.EncodeToPNG());
        Debug.Log(string.Format("Screenshot saved: \"{0}\"", fileName));

        Destroy(screenshotTexture);
    }

    public static string ScreenshotName(string path, int width, int height)
    {
        if (!Directory.Exists(path))
            Directory.CreateDirectory(path);

        return string.Format("{0}{1}_{2}x{3}_{4}.png", path, Application.loadedLevelName, width, height, DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss"));
    }
}