Incomplete Fog Masking of Chunk Boundaries Above Water Surfaces with Vibrant Visuals Enabled

When the "Vibrant Visuals" graphics mode is enabled, the fog above water surfaces fails to properly mask chunk loading boundaries, resulting in clearly visible chunk edges that break visual continuity.

Reproduction Steps

1. In Video Settings, set Graphics Mode to Vibrant Visuals.

2. ​ Go to an open ocean/river with large water area.

3. ​ Set Render Distance to 8–12 chunks (medium/low) to emphasize chunk boundaries.

4. ​ Observe the water surface from high place); chunk edges near horizon are clearly visible through fog.

Expected Behavior
Fog should smoothly mask chunk boundaries, creating a natural blend between water and sky, regardless of render distance.

Actual Behavior
Fog transition above water is incomplete; chunk boundaries appear as distinct “lines” or “faults,” especially at lower render distances. This only occurs with Vibrant Visuals; switching to Fancy/Fast resolves it.