Question about underwater tile culling

[Revmatek]

@daleeidd

Occasionally I see this underwater:

This seems to be the ocean tiles culling, it is directly affected by the far plane multiplier on the underwater renderer, lowering this value seems to mitigate it but not completely eliminate. Is there some other setting I am unaware of? Is this a bug? I have the far plane multiplier set very lower to avoid stuff like this, but setting it to 0 does not eliminate it, nor does that seem like the correct solution.

This seems to happen in the main scene when the far plane multiplier has higher values (which may be normal).

[daleeidd]

I am a bit confused about that image. Is it suppose to be really tall? Can you annotate or explain the issue you're seeing?

[Revmatek]

This is a screenshot of an underwater pov looking up. The rest of the screen is black because it is deep underwater. When you are deep underwater and turn the camera tiles on the edge of the screen start to disappear.

[Revmatek]

Here is a better show from BoatWakesScene:



On the left side you can see a tile culled / missing

In the example scenes this problem goes away if you decrease

I already have this setting pretty low in my project and it does not solve the problem some I am trying to figure out if this is a bug or I am missing / forgetting some other key setting that can affect this.

[daleeidd]

Is this reproducible with Dynamic Waves disabled? Seems related to #849.

[Revmatek]

While attempting to reproduce a separate issue I noticed this can also happen when zooming in an out above water:

[daleeidd]

Is this reproducible with Dynamic Waves disabled? Seems related to #849.

[Revmatek]

It still happens if I disabled "Create Dynamic Wave Sim". It could be related, I assume it will happen whenever its near the edge of the POV/Camera and the conditions are met (whatever those may be).

It does disappear when lowering the LOD to unreasonable levels like 1-3. I think its is based solely on perspective and camera, does not really seem related to anything but the tiles / tile culling.

[Revmatek]

@daleeidd
My original issue is caused by having the far clip plane high underwater on the Camera itself.

Example:

Having a far clipping plane is needed for flying at high altitude and seeing the ocean without the skybox / background becoming visible. This problem seems fixable on my end by simply lowering the far clip plane underwater when:

Not sure there is a bug here, definitely inaccuracy culling underwater tiles / water fog with further view distances.

[daleeidd]

Solved in 4.20.