I’ve tried a slightly larger frontface culled copy of the waterfall mesh with some warping on it and this is what I got. It doesn’t work perfectly since depending on the angle the edge is not as aparent.
From the side the wall trumps the edge:
I’ve tried a slightly larger frontface culled copy of the waterfall mesh with some warping on it and this is what I got. It doesn’t work perfectly since depending on the angle the edge is not as aparent.
From the side the wall trumps the edge: