More help, fellow Lead Adventurers!
I'm in the process of test painting a stream section, a shallow one most likely in a wooded area. I was going to paint it blue, but i suddenly remembered 'streams aren't blue!'. I've tried a test, using browns of various shades and a coat of PVA,

Ok, i haven't got an updated photo because i can't find the camera, just wondering if anyone had tried something similar/knowns a useful link.
Thanks