If the lighting engine won't work for water as-is, I would be very happy with new pieces that were self-illuminated water spouts. That'd be amazing for nighttime shows!
Same! Also colorable glowing mist, fog , waterfalls, spiderwebs... Maybe placeable glowing 'reflections' we can place in our underground caverns to give the illusion of light.
Old Black Water, please stop rolling.
Planco light, won't you please just on shine on me?
Old black water, keeps on rolling.
Planco light, won't you please just on shine on me?
Just shine with your lights,
please make everything,
Planco great devs, please make everything so bright!