I am new to ARKit (and iOS dev)... I've built a very simple AR experience - importing a 3d model into Xode via Reality Composer and Reality Converter. All is working fine apart from one thing... I would like to apply a Black & White Filter to the camera feed in an AR session. I found this link but it looks like the code is depracated... https://github.com/BlackMirrorz/ARKitCameraFeedFilter I also found this link in the developer docs which looks like it would do the trick but I have no idea how to implement it. (alos, it looks like its in Metal which is over my head at the moment!) https://developer.apple.com/documentation/scenekit/scntechnique Any help would be greatly appreciated