I want to exchange the simple hand drawn lava flow map by a more decent one, so I have made a crater in WorldMachine, with some nice eroded gullies. But can anyone tell me how I can get the lowest areas of these gullies to act as a flow map, in other words what should I do in WorldMachine to get that flow map? I have now saved both flow and deposition maps, but although they do give some nice lines streaming down, they do not follow the lowest areas.
Screenshot shows some lava lines, but I'd prefer them in the real dips. And here's the tmd file as well.