Multiple users have specifically requested to have caves that are completely flooded, especially in 1.14.4, since that is a feature provided in vanilla but not with my mod.

I am currently unsure as to the best way to approach this. One option is to make all caves/caverns underneath oceans flooded. I think this makes the most sense, and adheres pretty closely to the behavior in vanilla. Of course, I would probably provide this as a config option for players who wish to disable this behavior.

A consideration: should the caves/caverns be completely flooded? I think it may be better if, for example, caverns have a few layers of air at the top, rather than being completely filled with water. This would make the caverns a little more viable to explore - it would allow the player to better experience the flooded caverns without requiring a water breathing potion.

Consider adding option for user to specify max liquid level in flooded caves, separate from normal liquid level.
Also, for this to make sense, I will have to make it impossible for lava regions to spawn in oceans if the user has the flooded cave option enabled.

Added in 1.12.2-2.0. Will be added in updates to future versions as well.