The only thing I’d request is the ability to set the speed of the river per spline point, or if it scaled depending on the width of the spline point (for example a smaller width would be faster and it would blend between the other two spline points). I’ve managed to achieve it with a normal material so should be achievable but I know nothing about flow maps and DF implementation (not needed it as yet :P). But if it had something like I’d definitely drop 50 bucks on it.