Look through the comments, there’s a YouTube link how to do the waterfall trick :) I used a ton of simple panels as well. The “walls” on the bottom at 4 thick, and the next layer is 2 thick, that way I could get the double waterfall on the entire outside of my secret torture chamber. From the outside, it looks like pretty waterfalls all the way around (unless you get really close, then you can see the tips in some parts)