Diff of Emu War Online 3 at 494b3bc

@@ -14,3 +14,3 @@ Features implemented:
 *** They run from sources at the tallest points with sufficient separation (found greedily).
-*** Terrain near the river centre-line (source to sink path) is flooded and eroded somewhat. Valleys don't really work properly due to bad.
+*** Terrain near the river centre-line (source to sink path) is flooded and eroded somewhat. This entire component is a hack which only functions due to many fudge constants and the contouring system allowing absolute height to be mostly ignored, particularly under the rivers themselves. It works well enough to sometimes make reasonable valleys.
 ** The world is an island surrounded by ocean.