Erosion

Erosion 1 -- Setting up the base code and height map generation.
Erosion 2 -- Testing a simple erosion algorithm by eroding from one point.
Erosion 3 -- Performing the erosion from each point in the height map.
Erosion 4 -- Adjusting the erosion by adding a simple blend effect.
Erosion 5 -- Using a more complex blend effect to create better looking erosion.
Erosion 6 -- Trying to create continuous river systems by defining sea level.
Erosion 7 -- Defining lakes and blending the erosion.
Erosion 8 -- Trying to optimize the erosion blending and lake creation process.
Erosion 9 -- Improving the lake and erosion process.