I'm trying to experiment with the heightfield make river operator. But it doesn't seem to do anything. It popup a window saying tg is "carving river". This takes some time. Then I get a "heightfield make river" node, but no river apears in the terrain. Actually, the terrain doesn't change at all.
Also every little change I make to the "heightfield make river" node immediately popup the same window "carving river", which again takes some time. It is a little ridiculous, because if I want to change a value, say, to 50, and I start typing down 5.. it immediately popup the window again and doesn't wait for me to finish typing. Maybe there should be an apply button...
So, how do I make a river bed in tg2? Bear in mind I'm a noob in tg so there is probably a simple way, but I just don't know it...