I have noticed over the years that several artists seem to make their rivers go uphill. It really is a matter of learning perspective. I will be making a video of the simple secrets in achieving this by using a one brush technique. I have been painting for over 50 years and have used this technique ever since I analysed the problem, all those years ago.. There will be many of you that will Poo Poo this analysis, I congratulate you. I will be only trying to help in a little way by passing on my thoughts.