Thanks ... I have a planned workflow between Fractal terrains-->Gplates-->FT-->Wilbur-->Worldmachine-->Photoshop ....

Hopefully I will get where I am heading too possibly I want to draw as much as possible inside FT befoure dismissing it because I love the offset prescale tools ... right now I drawed a kind of Nile/Colorado river , I painted dry climate to obtained a kind of Desert Region so to have only one big river ...