If you walk in the water for a few seconds, the area around will gradually light up. After exiting it will immediately decrease.
Water Night Vision Needs Adjustments
Standing in Water Grants Night Vision
Underwater vision triggers when above water
"Night Vision" effect without NV being applied using new water vision mechanics
the sight of the "Night Vision" effect gets confused when you go to a water source
Night Vision effect while above water.
Water Lighting affects the Shading Above Water
Lighting bug in dark areas with water.
Underwater Vision Not only underwater.
When the player's head is half underwater and half below, all underwater terrain is visible
being underwater causes night vision, even in a water-empty cave
18w09a - Water Lighting bug
Clear view through the water if half in
Underwater brightness can be abused as nightvision
New water vision makes lighting flash when swimming on surface after swimming underwater