Why do people use caustics everywhere they draw water? If you look up real photos of rivers and lakes, you won't see caustics, just bottom if the water is clear and shallow, some ripples and reflection of sky and surroundings. It is actually hard to find real caustics photo on google image search - most came out of badly done 3d renders.Also, these voronoi diagram patterns arises only at very specific ripples conditions, producing equidistant waves. Yet in pixelart, water caustics are seems mandatory, and they all look like caustics are on the surface, not the bottom. In fact, pixelart lava is frequently made out of recolored water with caustics!! Lava. With caustics. Makes you think...