screenShot to sprite

I am creating a fairly complex programmatic gameboard using multiple gameObjects, sprites, materials, etc. Once it is created it is static so I want to take a screenshot photo of the gameboard and convert that to a single sprite -- goal is to save on draw calls, move it around and scale it cleanly (eg in a menu), etc.

My work flow is:
1. set up the gameboard
2. use ReadPixels to take the screenshot into a Texture2D
3. use Sprite.Create() to display the image using a single new gameObject
4. kill all the previous gameObjects

Everything is working, EXCEPT that the image that is created is scaled smaller than the original screen. I can't figure out why the image is a shrunken version of the original screen. I want a 1 for 1 pixel for pixel representation in my sprite.

Thank you in advance for any ideas as to why this shrinking is happening?

Relevant code is below:

In a class attached to camera:

Code (csharp):

1.  
2. public class TakeScreenShot : MonoBehaviour {
3.  
4.     public static int snapPhoto = 0;
5.     public static Texture2D image;
6.  
7.     IEnumerator OnPostRender () {
8.         if (snapPhoto==1) {
9.             yield return new WaitForEndOfFrame();
10.             image = new Texture2D(Screen.width,Screen.height,TextureFormat.RGB24,false);
11.             image.ReadPixels(new Rect(0,0,Screen.width,Screen.height),0,0,false);
12.             image.Apply();
13.             snapPhoto = 2;
14.         }
15.     }
16. }
17.  

In main in Update():

Code (csharp):

1.  
2. if (Input.GetMouseButtonDown(0)) {
3.     TakeScreenShot.snapPhoto = 1;
4. }
5.  
6. if (TakeScreenShot.snapPhoto == 2) {
7.     TakeScreenShot.snapPhoto = 0;
8.     GameObject go = new GameObject();
9.            
10.     SpriteRenderer sr = go.AddComponent<SpriteRenderer>();
11.     sr.sprite = Sprite.Create(TakeScreenShot.image,new Rect(0,0,Screen.width,Screen.height),new Vector2(0,0));
12.     Vector3 gotrlp = go.GetComponent<Transform>().localPosition;
13.     gotrlp.x = -2f; //set this to bottom left of screen so that whole image can be displayed
14.     gotrlp.y = -2f; //set this to bottom left of screen so that whole image can be displayed
15.     go.GetComponent<Transform>().localPosition = gotrlp;
16. }
17.