public void setReflectionClippingOffset(float reflectionClippingOffset) {
        this.reflectionClippingOffset = reflectionClippingOffset;
        updateClipPlanes();
    }
sets the reflection clipping plane offset
set a negative value to lower the clipping plane for reflection texture rendering.

@param reflectionClippingOffset the desired offset (default=-5)
jme3-effects/src/main/java/com/jme3/water/SimpleWaterProcessor.java