ClearFlags don't seem to work when I manually call Render() on my cameras.

Hi there,

I'm having a bit of an issue with taking screenshots in our game. Rather than using Application.CaptureScreenshot(), I create a RenderTexture with my own sizing and handle rendering myself (so I have a bit more control over what is in the screenshot...ie I don't add the HUD camera).

So my code looks like this:

 if( Input.GetKeyDown( KeyCode.F12 ) && m_OrderedCameras != null )
 {
      RenderTexture rt = new RenderTexture( m_ResWidth, m_ResHeight, 24 );
      Texture2D screenShot = new Texture2D( m_ResWidth, m_ResHeight, TextureFormat.RGB24, false );
     
      for( int i = 0; i < m_OrderedCameras.Length; ++i )
      {
         if( m_OrderedCameras[ i ] != null )
         {
             m_OrderedCameras[ i ].targetTexture = rt;
             m_OrderedCameras[ i ].Render();
             m_OrderedCameras[ i ].targetTexture = null;
         }
     }
     
     RenderTexture oldRT = RenderTexture.active;
     RenderTexture.active = rt;
     screenShot.ReadPixels( new Rect( 0, 0, (float)m_ResWidth, (float)m_ResHeight ), 0, 0 );
     RenderTexture.active = oldRT;
     Destroy( rt );
     
     string filename = Application.dataPath.Substring( 0, Application.dataPath.LastIndexOf( "/" ) );
     filename = filename.Substring( 0, filename.LastIndexOf( "/" ) );
     System.IO.Directory.CreateDirectory( filename + "/Screenshots" );
     filename += string.Format( "/Screenshots/screen_{0}x{1}_{2}.png", m_ResWidth, m_ResHeight, System.DateTime.Now.ToString( "yyyy-MM-dd_HH-mm-ss" ) );
     
     System.IO.File.WriteAllBytes( filename, screenShot.EncodeToPNG() );
     
     Debug.Log( "Screenshot taken:  " + filename );
    }

The code is pretty straightforward I believe. The problem, however, is that some of my cameras aren't doing what they should be...or at least...what they do during normal rendering.

For instance, I use about 7 cameras during our main loop (in order based on depth):

• Distant Camera - clears to Skybox, renders distant objects

• Environment Camera - clears depth only, renders most objects, Post: DoF Scatter

• SmallEnemy Camera - no clearing, renders small enemies, Post: Color Correction

• Effects Camera - no clearing, renders particle FX

• Radar Camera - no clearing, renders radar-related objects

• Player Camera - no clearing, renders player, Post: Vignette

So, here is a very specific test I ran that clearly outlines the problem and hopefully what's happening for some graphics-savvy person out there.

1. I use just the Distant camera and everything renders as you'd expect.

2. I add Environment camera ontop of that and now the Skybox doesn't render, but there is DoF.

3. I then add the SmallEnemy camera...skybox doesn't render, DoF gone, CC is ok though

4. I get up to adding the player and now color correction is also gone...

I added some debug text to the OnRenderImage of the Depth of Field and Color Correction post processing scripts and they got hit during the manual rendering. I don't understand why there's no skybox, and I certainly don't understand how a future camera could 'undo' the DoF unless it also rendered the same layers (which none do). I've noticed where the sky doesn't render that in some tests I saw the player again, but upside-down.

In any case, I appreciate all help anyone can provide, this has me stumped.

Thanks!

-Matt