Raycasting with fill tool experiment and nature shader update
When I mean raycasting, I mean a method that locks down different parts to be flooded when they have been flooded. It's very early in development and may be thrown in the bin or developed on further.
Other news, I have removed the pixelation effect from Nature Shader and given it that gothic dark nature look. I recommend Warm Shader for nature things too, since it's very moody.