How to save a picture (take screenshot) from a camera in game?

You could try this:

http://unity3d.com/support/documentation/ScriptReference/WWWForm.html

Which from the link in this Answer: http://answers.unity3d.com/questions/292/is-is-possible-to-output-screenshots-from-unity

1. Create a render texture.

2. Apply it on the camera.

3. Reference the camera in the script

4. Set the render texture as active RenderTexture.active

5. Create a Texture2D to which you dump the current RenderTexture

6. Put back the original RenderTexture.active back. Things to worry about: PNG files store alpha channels as well as any other color information. Sometimes some object might not appear because they simply have that information on it. Most of the time the Texture2D that you need has to be simply of type RGB24, not ARGB32.

Here is a code snippet that should help you:

 using UnityEngine;
 using System.Collections;
 using System;
 
 public class ScreenCapture : MonoBehaviour
 {
     public RenderTexture overviewTexture;
     GameObject OVcamera;
     public string path = "";
 
     void Start()
     {
         OVcamera = GameObject.FindGameObjectWithTag("OverviewCamera");
     }
 
     void LateUpdate()
     {           
         if (Input.GetKeyDown("f9"))
         {
             StartCoroutine(TakeScreenShot());
         }    
     }
 
     // return file name
     string fileName(int width, int height)
     {
        return string.Format("screen_{0}x{1}_{2}.png",
                              width, height,
                              System.DateTime.Now.ToString("yyyy-MM-dd_HH-mm-ss"));
     }
 
     public IEnumerator TakeScreenShot()
     {
         yield return new WaitForEndOfFrame();
 
         Camera camOV = OVcamera.camera;  
         RenderTexture currentRT = RenderTexture.active;    
         RenderTexture.active = camOV.targetTexture;
         camOV.Render();
         Texture2D imageOverview = new Texture2D(camOV.targetTexture.width, camOV.targetTexture.height, TextureFormat.RGB24, false);
         imageOverview.ReadPixels(new Rect(0, 0, camOV.targetTexture.width, camOV.targetTexture.height), 0, 0);
         imageOverview.Apply();
         RenderTexture.active = currentRT;    
         
         // Encode texture into PNG
         byte[] bytes = imageOverview.EncodeToPNG();
 
         // save in memory
         string filename = fileName(Convert.ToInt32(imageOverview.width), Convert.ToInt32(imageOverview.height));
         path = Application.persistentDataPath + "/Snapshots/" + filename;       
         System.IO.File.WriteAllBytes(path, bytes);
     }
 }

May be this will help someone. Here it is, follow this steps;

1. Go to Edit -> Project setting -> Player -> Other Setting -> Bundle Identifier. In that you can type the name company name and the product name like this "com.your_company_name.your_product_name".

2. Go to Edit -> Project setting -> Player -> Other Setting -> Write Access -> External(SD Card). That will create a new folder in your android device.

3. Now the path in your device is Android -> Data -> com.your_company_name.your_product_name -> files.

4. Create a class for take a screenshot and drag that into your maincamera.

   using UnityEngine; using System.Collections;

   public class Capture : MonoBehaviour { // Store more screenshots... private int Screen_Shot_Count = 0; // Screenshot taking by touch the button. public GUITexture Capture_Model;

     void Update()
        {
            if (Input.touches.Length > 0)
            // Finger hit the button position.
            if(Capture_Model.HitTest (Input.GetTouch(0).position))
            {
                if (Input.GetTouch(0).phase == TouchPhase.Began)
                {
                    // Screenshot name.
                    string Screen_Shot_File_Name;
                    do
                    {
                        // Increament the screenshot count.
                        Screen_Shot_Count++;
                        // Save the screenshot name as Screenshot_1.png, Screenshot_2.png, ...
                        Screen_Shot_File_Name = "Screenshot_" + Screen_Shot_Count + ".png";    
                    } 
                    while (System.IO.File.Exists(Screen_Shot_File_Name));
                    // Taking Screenshot.
                    Application.CaptureScreenshot(Screen_Shot_File_Name);
                }
            }
        }
    }
   
   

This script will help you to take a screenshot by using button.

if you want to save to a android device try this :

public static void SaveTextureToFile( Texture2D texture, string fileName)

         {

                     byte[] bytes=texture.EncodeToPNG();

                     if (Application.platform != RuntimePlatform.Android) 

                          File.WriteAllBytes (fileName + ".png", bytes);

                     else {

                          Debug.Log ("Android save file. path = " + Application.persistentDataPath + "/" + fileName + ".png");

                          File.WriteAllBytes (Application.persistentDataPath + "/" + fileName + ".png", bytes);

                     }

         }

a little present which i have worked on for about a day :P