\chapter*{Acknowledgements}
\addcontentsline{toc}{chapter}{Acknowledgements}

This work was typeset using \TeX{}, the typesetting system created by
Donald~E.~Knuth, together with Lua\TeX{} and the many packages maintained by
the \TeX{} community.  The TikZ and PGF system, created by Till~Tantau and
now maintained by Henri~Menke and the PGF/TikZ team, provides the drawing
layer on which this package rests.

The mathematical ideas behind the occlusion pipeline---a transitive partial
order comparator for affine simplices and the minimal partitioning
procedure---are my own, and they were first described in my TUGboat article
\cite{nice2025luatikz3dtools}.  Everything else benefited from assistance.

\section*{Use of artificial intelligence}

I want to be straightforward about the role that AI tools played in this
project.  Large-language-model assistants---principally GitHub Copilot backed
by models from OpenAI and Anthropic---were used extensively during
development.  Their contributions included:

\begin{itemize}
    \item \textbf{Code.}  Drafting, reviewing, and refactoring substantial
        portions of the Lua source code, the \LaTeX3 style file, and the test
        suite.  The AI was an active pair-programming partner throughout.
    \item \textbf{Documentation.}  Drafting and editing the prose of this
        manual, including chapter organization, wording, and stylistic
        consistency.
    \item \textbf{Debugging.}  Diagnosing errors, suggesting fixes, and
        explaining unfamiliar corners of the Lua\TeX{} and expl3 ecosystems.
\end{itemize}

The core algorithms and the mathematical point of view are mine.  The
implementation and exposition were shaped collaboratively with AI assistance.
I see no reason to obscure that fact: these tools made the project
substantially more practical to carry out as a single author, and
acknowledging their role honestly is, I believe, more useful to readers than
pretending otherwise.

\section*{Community}

The broader \TeX{} and Lua\TeX{} communities deserve thanks for decades of
freely shared knowledge.  The CTAN maintainers, the authors of the
\texttt{l3kernel} and \texttt{l3packages} bundles, and the many contributors
to online forums and documentation all made this package possible in ways that
are difficult to enumerate individually.