Base opacity over deep water (a in the blend).
Underwater tint color (deep water reads toward this).
Grazing-angle (Fresnel) reflection color.
World meters one tile of the ripple normal map spans.
Screen-space refraction wobble (fraction of the screen).
Shoreline fade distance (meters of water depth over which it fades in).
Strength of the ripple normal perturbation.
Flat opaque "Water Mask" debug view.
Live look controls, read each frame.