Just a short update that shows off usage of what I've called the "river curve weight factor". Some of you mentioned that you thought the rivers were too curvy. So I've made multiple configurable options for rivers. The curve weight factor being one of them. I've added an animated gif that shows the factor in action, with the values 1.6, 1.4, 1.2, 1.0, 0.8, 0.6.
What do you think?