Add Water Reflection Intensity setting #381

Suggestion

Add a new slider setting called "Water Reflection Intensity" in the Water Settings menu, next to the existing "Water Refraction Intensity".

Motivation

Currently, Complementary has "Water Reflection Quality" (which changes the reflection method) and "Water Refraction Intensity" (which controls refraction strength), but there is no way to control the intensity/strength of the water reflections themselves. Some users find the reflections too strong for their taste (especially on Unbound water style) and would like a subtle reduction without fully disabling reflections via WATER_REFLECT_QUALITY = OFF.

Suggested implementation

The value is applied at the correct shared point for all water render paths (gbuffers_water, dh_water, and voxy_translucent), so a single multiplier works for vanilla, Distant Horizons and Voxy water:

1. In lib/common.glsl, alongside the other water options:

#define WATER_REFLECT_INTENSITY 1.0 //[0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0]

2. In lib/materials/specificMaterials/translucents/water.glsl (Step 4: Final Tweaks), apply it to reflectMult:

reflectMult *= (0.5 + 0.5 * NdotUmax0) * WATER_REFLECT_INTENSITY;

3. Register the option in shaders.properties (screen.WATER_SETTINGS and the sliders= list) and add a display name in lang/en_US.lang.

Behavior

• 1.0 = current/default behavior (no change)
• 0.0 = removes the reflection blend completely
• Intermediate values scale the reflection strength smoothly

I have tested this locally on r5.9.3 with Iris + Sodium + Voxy and it works as expected. Happy to open a PR if this is something you'd consider.