There is the following TODO in the Node.getLocalBounds:

    //TODO: For 3D case the intersecting transformed bounds and
    // transformed clip will not produce the correct bounds.

It was added in

changeset: 9125:17b75c99f494
parent: 9122:bb58b4ecb74e
user: Chien Yang <chien.yang@oracle.com>
date: Wed Dec 29 15:57:13 2010 -0800
summary: Partial fix to RT-6493: Implement 3D Bounds support