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moshangmusic
New Participant
July 1, 2019

Render Texture with OVR Overlay causes Invalid Cast Exception

I'm attempting to display my UI as a render texture using OVR Overlay. Whenever I assign a render texture in the OVR Overlay script and run, I get the following error "InvalidCastException: Specified cast is not valid.
OVROverlay.LatchLayerTextures () (at Assets/Oculus/VR/Scripts/OVROverlay.cs:453)
OVROverlay.LateUpdate () (at Assets/Oculus/VR/Scripts/OVROverlay.cs:903)"
Normal textures assigned to the script render fine in HMD. Are there any specific settings that the render texture needs to conform to?
This is in Unity 2018.4.2f1.
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    3 replies

    bmoodyP3
    Inspiring
    September 11, 2019
    I have also had this issue. Were you able to find out why this happens?
    ForwardXPJim
    New Participant
    October 11, 2019
    Also happens in 2019.1.2f1.

    Basically, when run in the editor, the OVROverlay.cs code tries to check the texture type and tries to convert a UnityEngine.NativeFormatImporter returned by UnityEditor.TextureImporter.GetAtPath to a UnityEditor.TextureImporter, which is apparently a bad cast.

    My solution has been to comment out the code in OVROverlay.cs.  I don't like modifying the SDK code, but there's so many warnings during a compile that I've resigned myself to it.  I don't think Oculus tests the SDK samples when they release the SDK.

      ForwardXPJim
      New Participant
      October 16, 2019
      You can fix this by changing line 459 from:
      var importer = (UnityEditor.TextureImporter)UnityEditor.TextureImporter.GetAtPath(assetPath);

      To:
      var importer = UnityEditor.TextureImporter.GetAtPath(assetPath) as UnityEditor.TextureImporter;
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