Question How to properly take a screenshot using RenderTexture?

Hello,

I am using this plugin to take a 360 screen capture of the scene. This is the core of the capturing code:

Code (CSharp):

1. public static class I360Render
2. {
3.     private static Material equirectangularConverter = null;
4.     private static int paddingX;
5.  
6.     public static byte[] Capture( int width = 1024, bool encodeAsJPEG = true, Camera renderCam = null, bool faceCameraDirection = true )
7.     {
8.         if( renderCam == null )
9.         {
10.             renderCam = Camera.main;
11.             if( renderCam == null )
12.             {
13.                 Debug.LogError( "Error: no camera detected" );
14.                 return null;
15.             }
16.         }
17.  
18.         RenderTexture camTarget = renderCam.targetTexture;
19.  
20.         if( equirectangularConverter == null )
21.         {
22.             equirectangularConverter = new Material( Shader.Find( "Hidden/I360CubemapToEquirectangular" ) );
23.             paddingX = Shader.PropertyToID( "_PaddingX" );
24.         }
25.  
26.         int cubemapSize = Mathf.Min( Mathf.NextPowerOfTwo( width ), 8192 );
27.         RenderTexture activeRT = RenderTexture.active;
28.         RenderTexture cubemap = null, equirectangularTexture = null;
29.         Texture2D output = null;
30.         try
31.         {
32.             cubemap = RenderTexture.GetTemporary( cubemapSize, cubemapSize, 0 );
33.             cubemap.dimension = UnityEngine.Rendering.TextureDimension.Cube;
34.  
35. // Trying to write cubemap shows an error
36. //Texture2D outputC = new Texture2D(cubemap.width, cubemap.height, TextureFormat.ARGB32, false);
37.            //outputC.ReadPixels(new Rect(0, 0, cubemap.width, cubemap.height), 0, 0);
38.            //File.WriteAllBytes("D:/c.png", outputC.EncodeToPNG());
39.  
40.             equirectangularTexture = RenderTexture.GetTemporary( cubemapSize, cubemapSize / 2, 0 );
41.             equirectangularTexture.dimension = UnityEngine.Rendering.TextureDimension.Tex2D;
42.  
43.             if( !renderCam.RenderToCubemap( cubemap, 63 ) )
44.             {
45.                 Debug.LogError( "Rendering to cubemap is not supported on device/platform!" );
46.                 return null;
47.             }
48.  
49.             equirectangularConverter.SetFloat( paddingX, faceCameraDirection ? ( renderCam.transform.eulerAngles.y / 360f ) : 0f );
50.             Graphics.Blit( cubemap, equirectangularTexture, equirectangularConverter );
51.  
52.             RenderTexture.active = equirectangularTexture;
53.  
54. // I only changed RGB to ARGB32
55.             output = new Texture2D( equirectangularTexture.width, equirectangularTexture.height, TextureFormat.ARGB32, false );
56.             output.ReadPixels( new Rect( 0, 0, equirectangularTexture.width, equirectangularTexture.height ), 0, 0 );
57.  
58. // I did some tests, and the following line does not affect the rendering. I wrote output directly to a file here and still got wrong results.
59.             return encodeAsJPEG ? InsertXMPIntoTexture2D_JPEG( output ) : InsertXMPIntoTexture2D_PNG( output );
60.         }
61.         catch( Exception e )
62.         {
63.             Debug.LogException( e );
64.             return null;
65.         }
66.         finally
67.         {
68.             renderCam.targetTexture = camTarget;
69.             RenderTexture.active = activeRT;
70.  
71.             if( cubemap != null )
72.                 RenderTexture.ReleaseTemporary( cubemap );
73.  
74.             if( equirectangularTexture != null )
75.                 RenderTexture.ReleaseTemporary( equirectangularTexture );
76.  
77.             if (output != null)
78.                 UnityEngine.Object.DestroyImmediate(output);
79.         }
80.     }

I got correct results so far.

Then I used this shader/script for Reflections. (drag&drop the script to the object you want. Explanation here).

When the reflections script is Off, I get correct capture.
When the reflections script is On, normal objects turn black, and the floor (which I attached the reflection script to) is not visible. The floor is supposed to be a plane under the sphere, but it doesn't show up in the output capture:


Some people suggested using OnPostRender(). So instead of calling Capture from a button, I tried using OnPostRender(). The button sets a flag to True, and if OnPostRender() found it is True, it calls Capture and rests the flag.
Didn't work at all (no output file was written).

I am using a normal 3D project. The Game window shows correct results and reflections. When I attach a RenderTexture to the camera, it shows correct results.
When I use the Capture function, it shows black objects when the Reflection script is active.

Thank you.

 

Anyone, please ?