Real time rendering in cubemap in image effect

Question

I try to do that : -> MainCamera -> Script to render scene in cube map -> MainCamera -> Script image effect using the cube map (This script it's OK with static cube-map)

The result is :

A empty grey cube map
have this bug :

RenderTexture error: failed to retrieve color surface [invalid call] Erro in file: C:/BuildAgent/work/d9c031b1c154f5ae/Runtime/GfxDevice/d3d/RenderTextureD3D.cpp at line: 278

perhaps it's the same on this thread : http://answers.unity3d.com/questions/16149/Water-in-cubemap.html

My render cube map script : ( you can see my tests )

 enum TextureCubeMapSize
 {
     Low = 512,
     Normal = 1024,
     Best = 2048,
     //VeryHigh = 4096,
 }
     
 public var m_TextureCubeMapSize : TextureCubeMapSize = TextureCubeMapSize.Normal ;
 public var m_RenderTexture : RenderTexture = null ;
 public var m_OneFacePerFrame = false ;
 //private var m_DummyCam : Camera = null ;
     
 function OnDisable()
 {
     if( m_RenderTexture )
     {
         DestroyImmediate( m_RenderTexture ) ;
         m_RenderTexture = null ;
     }
     
 //    if( m_DummyCam )
 //    {
 //        DestroyImmediate( m_DummyCam ) ;
 //        m_DummyCam = null ;
 //    }
 }
 
 function Start () 
 {
     // render all six faces at startup
     UpdateCubemap( 63 ) ;
 }
 
 function LateUpdate() 
 {    
     //yield WaitForEndOfFrame() ;
         UpdateCubemap() ;
     //yield ;
 }
 /*
 function OnPostRender()
 {}
 
 function OnPreCull()
 {}
 
 function OnPreRender()
 {}
 
 function OnRenderImage( inSource : RenderTexture, inDestination : RenderTexture ) 
 {}
 
 function OnRenderObject()
 {}
 */
 
 function OnWillRenderObject()
 {        
     //UpdateCubemap() ;
 }
 
 function OnWillRender() 
 {        
     //UpdateCubemap() ;
 }
 
 function UpdateCubemap( inFaceMask : int ) 
 {
 //    if( !m_DummyCam )
 //    {
 //        var aDummyCamObject = new GameObject ("CubemapCamera", Camera ) ;
 //        aDummyCamObject.hideFlags = HideFlags.HideAndDontSave;
 //        aDummyCamObject.transform.position = transform.position ;
 //        aDummyCamObject.transform.rotation = transform.rotation ;
 //        m_DummyCam = aDummyCamObject.camera;
 //        m_DummyCam.enabled = false ;
 //    }
     
     if( !m_RenderTexture ) 
     {    
         m_RenderTexture = new RenderTexture( m_TextureCubeMapSize, m_TextureCubeMapSize, 16, RenderTextureFormat.RGB565, RenderTextureReadWrite.Default ) ;
         m_RenderTexture.isCubemap = true ;
         //m_RenderTexture.hideFlags = HideFlags.HideAndDontSave ;     
         //camera.targetTexture = m_RenderTexture ;      
     }
 
 //    m_DummyCam.transform.position = transform.position ;
 //    m_DummyCam.transform.rotation = transform.rotation ;
     camera.RenderToCubemap( m_RenderTexture, inFaceMask ) ;
     
 }
 
 function UpdateCubemap()
 {
     if( m_OneFacePerFrame )
     {
         var aFaceToRender = Time.frameCount % 6 ;
         var aFaceMask = 1 << aFaceToRender ;
         UpdateCubemap( aFaceMask ) ;            
     } 
     else 
     {
         UpdateCubemap( 63 ) ; // all six faces
     }    
 }

[Unity 3.5.5f3 pro : Windows seven 64bits : Geforce 650M 1Gb ( optimus use the geforce with unity ) : i5 : 8go RAM ]

Answer 1

It's work now :

You should use a dummy camera for the rendering in cube-map. Else you cannot use that into a post-effect. They are like a snake biting its own tail.

And i have a stupid error in my code from this function :

 OnRenderImage( inSource : RenderTexture, inDestination : RenderTexture )

I wrote that :

 if( m_ScriptRenderScene && !m_ScriptRenderScene.m_RenderTexture )
     m_Material.SetTexture( "inCube", m_ScriptRenderScene.m_RenderTexture ) ;

I delete the pointer negation and it's work ( this error is very stupid )

The result is :

 enum TextureCubeMapSize
 {
     Low = 512,
     Normal = 1024,
     Best = 2048,
     VeryHigh = 4096,
 }
     
 public var m_TextureCubeMapSize : TextureCubeMapSize = TextureCubeMapSize.Normal ;
 public var m_RenderTexture : RenderTexture = null ;
 public var m_OneFacePerFrame = false ;
 private var m_DummyCam : Camera = null ;
     
 function OnDisable()
 {
     if( m_RenderTexture )
     {
         DestroyImmediate( m_RenderTexture ) ;
         m_RenderTexture = null ;
     }
     
     if( m_DummyCam )
     {
         DestroyImmediate( m_DummyCam ) ;
         m_DummyCam = null ;
     }
 }
 
 function Start () 
 {
     // render all six faces at startup
     UpdateCubemap( 63 ) ;
 }
 
 function LateUpdate() 
 {    
     UpdateCubemap() ;
 }
 
 function UpdateCubemap( inFaceMask : int ) 
 {
     if( !m_DummyCam )
     {
         var aDummyCamObject = new GameObject ("CubemapCamera", Camera ) ;
         aDummyCamObject.hideFlags = HideFlags.HideAndDontSave;
         aDummyCamObject.transform.position = transform.position ;
         aDummyCamObject.transform.rotation = transform.rotation ;
         m_DummyCam = aDummyCamObject.camera;
         m_DummyCam.enabled = false ;
     }
     
     if( !m_RenderTexture ) 
     {    
         m_RenderTexture = new RenderTexture( m_TextureCubeMapSize, m_TextureCubeMapSize, 24 ) ;
         m_RenderTexture.isCubemap = true ; 
         m_RenderTexture.useMipMap = false ;
         m_RenderTexture.Create() ;       
 
     }
 
     m_DummyCam.transform.position = transform.position ;
     m_DummyCam.transform.rotation = transform.rotation ;
     m_DummyCam.RenderToCubemap( m_RenderTexture, inFaceMask ) ;    
 }
 
 function UpdateCubemap()
 {
     if( m_OneFacePerFrame )
     {
         var aFaceToRender = Time.frameCount % 6 ;
         var aFaceMask = 1 << aFaceToRender ;
         UpdateCubemap( aFaceMask ) ;            
     } 
     else 
     {
         UpdateCubemap( 63 ) ; // all six faces
     }    
 }

Now i have a other problem :

The camera orientation has no effect on the rendering cube-map. And it's very important for me.

Real time rendering in cubemap in image effect

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