I believe that the way the rules lay out the definition of what counts as a bottle is very specific. I'm sure that they have a custom ray tracer that rendered

I believe that the way the rules lay out the definition of what counts as a bottle is very specific. I'm sure that they have a custom ray tracer that rendered the scene. Every bottle has 2 parts that must be seen at some point in the video(not just at the same time), and reflections count again. This implies that they have a big grid, with all the bottles(top and bottom) on one axis, and all the reflective surfaces on the other. Every time a ray hits a bottle, check the appropriate boxes for the combo of bottle and surface. After rendering you'll have the ground truth answer they are looking for.