I was just wondering if anybody knows of a method to 'quickly' clean up the output of the river flow function in Wilbur. Currently the rivers are 1 pixel wide (which is fine) but there are many missing pixels and wierd joins/branches.

And example is probably best.

Name:  River Problems.jpg
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On the left is the original river flow output from Wilbur, whilst the right has the river after I have manually cleaned it up.

Any fast automatic ways to do this or something similar?