Unfortunate that your recording had issues the first time. Ya you are definitely right that really white teeth isn't natural. It was just easier to start with white and use unity to tint it yellow. I actually even debated changing whitening to just cleaning and start with a more natural look but I was running out of time and decided to focus more on gameplay than making the logic of the teeth make more sense. I didn't start out trying to make an educational game on teeth but more like I just thought the idea of of teeth getting yellower making the enemies more aggressive was really interesting and so I built everything around that and it just worked out really well.