River water is not detected deeper than about 3 m below the surface...

SUMMARY
The engine stops reporting river water about 3 m below the surface, whatever the real depth. A character falling below that limit loses swimming and walks on the bed, with water visible above its head. A fall from about 2.4 m above the water is enough; 1.9 m is not. Entering slowly from a bank is fine.
MinDepth changes the wireframe in the World Editor, but not this limit.

TEST CASES
Run in Play mode on a custom terrain, using "Play from Camera Position" to drop the character over the river. Not run on a vanilla terrain. Fall heights are above the water surface.

1. Depth 2.8 m, MinDepth 1
- 1 m fall: starts swimming and floats up.
- About 5 m fall: hits the bed at about -11 m/s, survives, then floats up.
- About 8 m fall: dies on the bed (-12 m/s).
- Water is detected down to the bed.

2. Depth 5.9 m, MinDepth 1
- 1 m fall: stops about 2.3 m below the surface and floats up.
- About 5 m fall: 3 m below the surface, submersion and surface drop to 0, swimming stops, the character reaches the bed and walks on it.
- Walking back up a slope: swimming restarts about 2.8-2.9 m below the surface, then the character floats up.

3. Depth 4.3 m, MinDepth 4.625
- 1 m fall: floats up.
- About 1.9 m fall: stays swimming, seen 2.67 m below the surface.
- Water stops being detected about 3 m below the surface.

4. Depth 5.7 m, MinDepth 15
- 1 m fall: floats up.
- About 2.4 m fall: goes through the 3 m limit and walks on the bed.
- Limit unchanged, although the World Editor wireframe is much deeper.

5. About 6 m deep, MinDepth 15 and GeometryAsObb, saved
- Limit unchanged, same behaviour.

6. Depth 10 m, bed below ocean level (surface +8.05, bed -2.09, ocean 0), MinDepth 1
- 1 m fall: floats up normally.
- About 4 m fall: river detected from +8.05 to about +5.05, no water from there to about 0, then ocean.
- The character goes through the river, falls freely in the gap, is hurt on the bed, then swims against the ocean surface. It stayed held between about y = -1.4 and -2.1 for 30 s and cannot reach the river surface.

EXPECTED
Water is detected down to the terrain. The character keeps swimming and floats back up.

QUESTIONS
Is the 3 m limit intended? What is MinDepth supposed to change at runtime?

SUMMARY The engine stops reporting river water about 3 m below the surface, whatever the real depth. A character falling below that limit loses swimming and walks on the bed, with water visible above its head. A fall from about 2.4 m above the water is enough; 1.9 m is not. Entering slowly from a bank is fine. MinDepth changes the wireframe in the World Editor, but not this limit. TEST CASES Run in Play mode on a custom terrain, using "Play from Camera Position" to drop the character over the river. Not run on a vanilla terrain. Fall heights are above the water surface. 1. Depth 2.8 m, MinDepth 1 - 1 m fall: starts swimming and floats up. - About 5 m fall: hits the bed at about -11 m/s, survives, then floats up. - About 8 m fall: dies on the bed (-12 m/s). - Water is detected down to the bed. 2. Depth 5.9 m, MinDepth 1 - 1 m fall: stops about 2.3 m below the surface and floats up. - About 5 m fall: 3 m below the surface, submersion and surface drop to 0, swimming stops, the character reaches the bed and walks on it. - Walking back up a slope: swimming restarts about 2.8-2.9 m below the surface, then the character floats up. 3. Depth 4.3 m, MinDepth 4.625 - 1 m fall: floats up. - About 1.9 m fall: stays swimming, seen 2.67 m below the surface. - Water stops being detected about 3 m below the surface. 4. Depth 5.7 m, MinDepth 15 - 1 m fall: floats up. - About 2.4 m fall: goes through the 3 m limit and walks on the bed. - Limit unchanged, although the World Editor wireframe is much deeper. 5. About 6 m deep, MinDepth 15 and GeometryAsObb, saved - Limit unchanged, same behaviour. 6. Depth 10 m, bed below ocean level (surface +8.05, bed -2.09, ocean 0), MinDepth 1 - 1 m fall: floats up normally. - About 4 m fall: river detected from +8.05 to about +5.05, no water from there to about 0, then ocean. - The character goes through the river, falls freely in the gap, is hurt on the bed, then swims against the ocean surface. It stayed held between about y = -1.4 and -2.1 for 30 s and cannot reach the river surface. EXPECTED Water is detected down to the terrain. The character keeps swimming and floats back up. QUESTIONS Is the 3 m limit intended? What is MinDepth supposed to change at runtime?

River water is not detected deeper than about 3 m below the surface: character walks on the river bed

River water is not detected deeper than about 3 m below the surface: character walks on the river bed