I would have liked to post this in the thread that had the upgraded shader that was created for windows where the water is running down the windows. Its likely? that we could use the window running water on roofs to get this effect but it would have to be scaled up. In Thief there is a shader with water sheeting down the roofs. It almost looks "veiny" and a bit like honeycomb in places because of the eddies flowing together from the sheeting action of water down the roofs. There are actually 2 different shaders going on here so I tried to highlight the water streams at the edges of