Helicopter Gunship DEX update for 24 March 2023

This update adds in all the bits 'n' pieces for water interaction/collisions.

**HOT FIX***

Corrects the dust particle system for the Kiowa so that it no longer smoke bombs the entire screen!

Patch Notes

1. Your helicopter now interacts with the water layer correctly with a fairly realistic drag and buoyancy system. Dipping a wheel of the Apache while hovering is perfectly fine, doing it at 130kts will most likely flip the helicopter into the water nose first!

All helicopter systems will take damage from being submerged. Main Rotor & Tail Rotor are particularly susceptible to damage.

2. Added a rotor wash effect to the surface of the water when you are close to it.

3. Updated the dust particle system so that it will change colour depending on whether you are over water or terrain.

4. Added a new music track.

5. Optimised the dust particle effects to use about 60% less particles which should help those that see an FPS drop due to the dust clouds at low level.

Known Bugs

1. When the world is re-centered the rotor wash effect on the water surface doesn't follow the update correctly and looks a bit strange for a few seconds.

This has been a particularly time consuming update and it isn't perfect. However, I don't want to spend too much time at the moment perfecting water visuals/collisions when there are more important things that need adding to the game. I will come back and polish this part of the game a bit later, but for now it is serviceable.