Quote Originally Posted by waldronate View Post
The first map is was a quick run with Wilbur (basin fill, noise, basin fill to get things connected and then a river flow map to see the results). The hard part was pulling the altitudes out of the original image. I converted to HLS and set the S channel constant to get rid of shadows. Then posterized to a few levels and converted the colors to grayscale altitudes. Eliminating the high-frequency data during the posterize step helps get simpler river flows.
The new altitude map shows one of the problems with using a simulator type of program like Wilbur with high-quality data, especially when the data is sampled at too low of a frequency to capture the major flows. Little details push flow in completely unexpected directions after the basin fill step.
t0.jpg
Wow!

I am super impressed!

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