I like to use a rigger - a long flexible brush - when I paint the branches of trees. I can suggest the swaying of the twigs better with this brush. The tree here, from The Tiger and the Persimmon in The Land of the Dragon King , is done in a traditional Korean style.
In another of my Korean stories, Clever Rabbit, the tree I painted is influenced more by the anthropomorphic trees of Arthur Rackham which I loved a child.
I did it like this, with a face and hands because, in the story, the pine tree is a character and talks to the man and the tiger.
The story I'm currently working on is inspired by trees I climbed when I was a child. Trees have always held a fascination for me- they stand so still, yet have so much life in them. I love the bark patterns where the branches meet the trunk - like elephant skin. It took a long time to really understand holes - that branches once grew from them - and to see how the bark patterns work around them.
In this illustration the tree is more of a presence than a character so I wanted only the suggestion of an expression - you have to look hard to see the tree's features.