Unity camera rendering - unity3d

Question

I have a problem with a camera, I want to take a screenshot but I get this error:
Flare renderer to update not found UnityEngine.Camera:Render()
c__Iterator4:MoveNext() (at
Assets/Scripts/ActionCam.cs:43)
My code:
public IEnumerator TakeScreenshot() {
yield return new WaitForEndOfFrame();
Camera camOV = _Camera;
RenderTexture currentRT = RenderTexture.active;
RenderTexture.active = camOV.targetTexture;
camOV.Render(); // here is the problem...
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;
byte[] bytes = imageOverview.EncodeToPNG();
string path = ScreenShotName(Convert.ToInt32(imageOverview.width), Convert.ToInt32(imageOverview.height));
System.IO.File.WriteAllBytes(path, bytes);
}
There are my camera settings:
If I deactivate the "Flare Layer" I don't get this error, but my screenshots are more or less empty, only the skybox:
any idea?

Answer 1

I Use 3 types of screenshot in unity:
Application.CaptureScreenshot(ScreenSgotFile): Not using anymore because I prefer methods that stores the screenshots in memory. (I don't need the file because it is attached to a MailMessage and sended by an SmtpClient)
OnPostRender (it must be attached to a camera):
void OnPostRender(){
Texture2D ScreenShot=new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
RenderTexture.active=null;
ScreenShot.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
ScreenShot.Apply();
byte[] PngData=ScreenShot.EncodeToPNG();
PngStream = new MemoryStream(PngData);
//File.WriteAllBytes(FileShot, PngData);
// Preview on a sprite
Sprite Spr=Sprite.Create(ScreenShot, new Rect(0, 0, ScreenShot.width, ScreenShot.height),Vector2.zero, 100);
Preview.sprite=Spr;
Preview.gameObject.SetActive(true);
}
The same code but at the end of frame:
void Update(){
...
StartCoroutine(ScreenShotAtEndOfFrame());
}
public IEnumerator ScreenShotAtEndOfFrame(){
yield return new WaitForEndOfFrame();
Texture2D ScreenShot=new Texture2D(Screen.width, Screen.height, TextureFormat.RGB24, false);
RenderTexture.active=null; `enter code here`
ScreenShot.ReadPixels(new Rect(0, 0, Screen.width, Screen.height), 0, 0);
ScreenShot.Apply();
byte[] PngData=ScreenShot.EncodeToPNG();
PngStream = new MemoryStream(PngData);
//File.WriteAllBytes(FileShot, PngData);
// Preview on a sprite
Sprite Spr=Sprite.Create(ScreenShot, new Rect(0, 0, ScreenShot.width, ScreenShot.height),Vector2.zero, 100);
Preview.sprite=Spr;
Preview.gameObject.SetActive(true);
}