I love clients who are specific about what they want, but understand the limitations of our medium.
She came to me with a spreadsheet of multiple animals cross referenced by where she wanted them to appear in the tree. After talking about how best to do this, we agreed on a less literal interpretation of her list. If you look closely you will see twelve of her chosen menagerie silhouetted in the gray shading of the trunk.
Challenging and enormously fun to do.