I like the sound of this. But your real target audience are the developers eh?
Just make sure the ideas are on point. Why would we love it, why would they implement it, and more importantly, can it be easily implemented into the game :P …
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Thats an awesome idea, and would tie in very well with the idea of having currents. Imagine being able to navigate a cave using underwater currents, and doing this with only the lights from the shrooms and bioluminescent life.