I'm using ARFoundation to do facetracking on iOS with blendshapes. I want to slightly blur the camera feed you see in the background, so your actual face (and environment) is not recognisable. I know you can use 'Custom Material' on the ARCamera component. Which on iOS, it feeds the material 2 textures (textureY and textureCbCr). Can anybody help out either to write a shader which blurs those textures or do it in another way (renderpass? renderfeature? blit?) Thanks in advance!