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Fanciful trees. Symbolic trees. Candy trees.

Seeing Risto's tree shapes makes me think to note that the trees in my first example could be "trimmed" to have a rougher tree-like edge. ie: After...

I can't think of any great examples right now but your assignment does spark some ideas ...

It is comforting that the assignment is to be 'artistic'. That's much flexible than being 'realistic'. ...