Strat-map editing: Rivers/Land features

[Lord Adherbal]

use the pencil, not the brush, it doesn't do anti-aliasing

[nikolai1962]

Or set the brush to 100% hardness (i think that's the one). It doesn't smudge the colours then.

[Ciaran]

use the pencil, not the brush, it doesn't do anti-aliasing

I was missing that particular tool, I didn´t know you had to switch between brush and pencil. Thanks (mostly for confirming that a pencil tool actually exists).