Sadly...
formatting doesn't work on the screenshot comments so all spaces/tabulators are lost and code look like it's in sorry state...
Gladly programs generally automatically add them back, soo the code will look good after copy, paste, compile

Some guy asked me for code "for diving" so I post it there in comment section.
It's just adding diving and nothing else, there is no balancing/whatever

You can stand on the ocean's floor and switch weapons there or regain stamina etc etc


Mobs can't dive, (code doesn't add it)
so either non-swimming one will wait for you at the ocean's floor
or swimming ones will wait at the water surface

Serpents wait at the surface.
During screenshot I lowered serpents a bit so they are underwater like me, but only cosmettically for screenshot, it's not in the code

Code that remove camera lock, now you can look under water:

Class: public class GameCamera : MonoBehaviour
Method: private void GetCameraPosition(float dt, out Vector3 pos, out Quaternion rot)

Delete those lines of code from method (don't need to add anything):
float waterLevel = WaterVolume.GetWaterLevel(vector3, 1f);
if (vector3.y < waterLevel + this.m_minWaterDistance)
{
vector3.y = waterLevel + this.m_minWaterDistance;
this.m_waterClipping = true;
}
else
{
this.m_waterClipping = false;}

Code that allows to dive up(crouch) and swim up(space):
Class: public class Character : MonoBehaviour, IDestructible, IWaterInteractable, Hoverable
Method: private void UpdateSwiming(float dt)

First remove this one line of code:
this.m_body.useGravity = true;
It's close to the bottom of method (under the code that you will be replacing)

Replace this code:
float num2 = this.m_waterLevel - this.m_swimDepth;
if (base.transform.position.y < num2)
{
float t = Mathf.Clamp01((num2 - base.transform.position.y) / 2f);
float target = Mathf.Lerp(0f, 10f, t);
Vector3 velocity = this.m_body.velocity;
velocity.y = Mathf.MoveTowards(velocity.y, target, 50f * dt);
this.m_body.velocity = velocity;
}
else
{
float t2 = Mathf.Clamp01(-(num2 - base.transform.position.y) / 1f);
float num3 = Mathf.Lerp(0f, 10f, t2);
Vector3 velocity2 = this.m_body.velocity;
velocity2.y = Mathf.MoveTowards(velocity2.y, -num3, 30f * dt);
this.m_body.velocity = velocity2;}




With this:
if (this.IsPlayer())
{
if (ZInput.GetButton("Jump"))
{
Vector3 velocity = this.m_body.velocity;
velocity.y = 2f;
if (base.transform.position.y > this.m_waterLevel - this.m_swimDepth - 0.5f)
{
velocity.y = 0.5f;
}
this.m_body.velocity = velocity;
}

else if (ZInput.GetButton("Crouch"))
{
Vector3 velocity2 = this.m_body.velocity;
velocity2.y = -2f;
this.m_body.velocity = velocity2;
}
else
{
Vector3 velocity3 = this.m_body.velocity;
velocity3.y = 0f;
this.m_body.velocity = velocity3;
}
this.m_body.useGravity = false;
}
else
{
float num2 = this.m_waterLevel - this.m_swimDepth;
if (base.transform.position.y < num2)
{
float t = Mathf.Clamp01((num2 - base.transform.position.y) / 2f);
float target2 = Mathf.Lerp(0f, 10f, t);
Vector3 velocity4 = this.m_body.velocity;
velocity4.y = Mathf.MoveTowards(velocity4.y, target2, 50f * dt);
this.m_body.velocity = velocity4;
}
else
{
float t2 = Mathf.Clamp01(-(num2 - base.transform.position.y) / 1f);
float num3 = Mathf.Lerp(0f, 10f, t2);
Vector3 velocity5 = this.m_body.velocity;
velocity5.y = Mathf.MoveTowards(velocity5.y, -num3, 30f * dt);
this.m_body.velocity = velocity5;
}
this.m_body.useGravity = true;}

well, at least this explains why they won't let you dive below the waters surface. I had suspected this is what would happen, thanks for confirming :)

You came to the wrong neighborhood MF xD

The water is ultra transparent ;d
The weird "floating" thingies on the horizont is the water surface, to be precise, the waves