Once i started pulling on the thread i could not stop. This branch should work like
before iwth one ocean, there are a few issues before it will support multiple instances.

Questions / problems that arose:

Lod data resolution should be global setting, right now taken from one instance
Validation gets passed "AnyInstance" in a few places, is this ok?
RenderData.Validate - uses any instance
RegisterLodDataClipSurface - this sets per-ocean data on MPB. might be tricky to fix..
How to connect underwater effect to ocean instance?
How to connect underwater environment lighting with ocean instance?
Debuggui always takes first instance of ocean, shall we make this selectable?
OceanChunkRenderer.OnWillRenderObject - tiles will need Layer so it only goes in one camera??

tag @daleeidd @moosichu in case this is of interest

Validation already enforces a camera as a parent.

Multiple Oceans: Connect underwater to ocean instance