CreateExternalTexture crash (Win10 64, D3D11, Unity 5.2.3f1)

I create a texture in D3D11 on the rendering thread with the following code. (Verified the creation works and the result texture pointer is non-null, function returning S_OK.)

Code (csharp):

1.  
2.   D3D11_TEXTURE2D_DESC TextureDesc ;
3.  
4.    TextureDesc . Width = Target -> Width ;
5.    TextureDesc . Height = Target -> Height;
6.    TextureDesc . MipLevels = 1 ;
7.    TextureDesc . ArraySize = 1 ;
8.    TextureDesc . Format = DXGI_FORMAT_B8G8R8A8_UNORM ;
9.    TextureDesc . SampleDesc . Count = 1 ;
10.    TextureDesc . SampleDesc . Quality = 0 ;
11.    TextureDesc . Usage = D3D11_USAGE_DEFAULT ;
12.    TextureDesc . BindFlags = D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET ;
13.    TextureDesc . CPUAccessFlags = 0 ;
14.    TextureDesc . MiscFlags = D3D11_RESOURCE_MISC_GDI_COMPATIBLE ;
15.  
16.    ID3D11Device * Device = UnityRenderDevice ( ) ;
17.  
18.    if ( ! Device )
19.    {
20.      Log ( "Can't create texture: Device not available." ) ;
21.  
22.      return ;
23.    }
24.  
25.    if ( Device -> CreateTexture2D ( & TextureDesc , nullptr , & Target -> Texture ) != S_OK )
26.    {
27.      Log ( "Can't create texture: CreateTexture2D error." ) ;
28.  
29.      return ;
30.    }
31.  
32.    if ( Target -> Texture -> QueryInterface < IDXGISurface1 > ( & Target -> Surface ) != S_OK )
33.    {
34.      Log ( "Can't create texture: QueryInterface < IDXGISurface1 > error." ) ;
35.  
36.      Target -> Texture -> Release ( ) ;
37.  
38.      Target -> Texture = nullptr ;
39.    }
40.  

Once I have synchronized with the main thread in C++ and gotten the texture IntPtr back into Unity (verifying it is not IntPtr.Zero), I try to do this:

Code (csharp):

1.  
2. CurrTexture = Texture2D . CreateExternalTexture ( Width , Height , TextureFormat . BGRA32 , false , false , TextureObject ) ;
3.  

This completely crashes (not to the Unity crash screen: Straight to the OS with no error indication at all). I have absolutely no way to get some sort of error code out of this. I have verified with debug statements that every single value is non-null. If I create a normal dummy unity texture instead of trying to use CreateExternalTexture, all of the rest of my code does not crash (but obviously does not use the actual texture I need it to). I have also verified the width/height being supplied are correct: I tried a static 128x128 instead of my supplied values, and it still crashes.

How can I debug this? What could be causing CreateExternalTexture to crash without Unity even able to catch the exception?

 

Sorry, disregard: The Texture2D has to be passed as ID3D11ShaderResourceView created from the ID3D11Texture2D, and then it works fine.

 

Try event viewer?