It's not just the fishing spots though. The water itself is modified, as well as trees in the background. The trees usually have holes in them, but it's almost like the texture was literally removed from them all, and only the polygons & shaders are left. Even the splash marks around the rocks.
Could it be a photoshop? Sure. But it would take time for it to look that way. He has two screenshots taken from different angles. If it was photoshop, he absolutely nailed it. I really don't feel like this is what's going on though