Beta Yellowsand Island 1.5

Haven't worked on this in a pretty long time
So here's what I did:
- Regrouped objects internally
- Added sounds to spring
- Fixed "Shuffleboard" alarm
- Fixed harbour parking lot having weird alpha settings
- Added vehicle reflection cubemap
- Redid cliff face:

Before


After
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- Sky settings matched with newest vanilla settings
- Redid clouds

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- Reworked ocean settings

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- Upgraded a few more materials to PBR
- Added "road_sky_reflection" cubemap to roads
- Added cubemaps for water bodies

https://github.com/SnoutBug/BeamNG_terrainMaterialCache/releases/tag/21683 still works with this version, I have not touched the terrain!