Thanks for the comments. Scott I can't see the effect about uphill flow but like a lot of these optical effects once you see something one way your brain will not let you see it any other way. I am a little unhappy with the bottom right corner but couldn't get in a position to change the composition without getting into a 3ft deep run and I am not quite crazy enough for that. I will look at brightening the foam streaks to see if that guides the eye quickly into the scene . I will return in the Autumn with waders to catch the foliage and avoid the midges, same as the Scottish ones, obviously coming on holiday here. At least here you can count them and unlike mosquitoes they can't "bite" through clothing. Off to Scotland at the weekend so it is a total cover up with head net and Skin So Soft. Ken