You should have worked your way in from the outside like I suggested.
edit: and I'm far too lazy to do this properly, but you should be darkening the leaves as it goes further out, so it doesn't look so flat. the middle of the tree top is the highest point so it should be lighter.
Pillow shading NUUUUUU
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Cid Night
Retired GK Staff Golden Pluffy Winner in Poetry
A poet never takes notes. You never take notes in a love affair. Robert Frost