This is a very low priority issue, but I figured I would report it anyway.
When looking through the orange glass at the top of the MH9 cockpit (the helicopter has to be upside down) the underwater caustics appear.
This works for small water depths. {F19652}
Get in an MH9
Fly over the coast (over water that is not too deep)
turn the helicopter upside down while flying (looping)
While doing that, look in 1st person view through the top glass
Watch the caustics and water through this beautiful orange glass
Mass closing ancient tickets with no activity for > 12 months; assume fixed or too trivial.
If this issue is still relevant in current dev build, please re-post.