example of using the front facing camera with OpenCV
see related article at: https://medium.com/@dariony/augmented-virtuality-119febdc1b17 and the full script referenced in the article here:
https://gist.github.com/dariol/cf40c6fd8da5749ef9cb5dd1e4d5bd5e
fully working executable:
https://github.com/dariol/ViveOpenCVExample/releases/tag/demo:
prerequisite asset store plugins:
https://assetstore.unity.com/packages/tools/integration/opencv-for-unity-21088
https://assetstore.unity.com/packages/tools/steamvr-plugin-32647
https://assetstore.unity.com/packages/tools/integration/vive-input-utility-64219
optional: any screen/camera shader effect collection on the asset store