答案1
众多选择之一。
\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{matrix}
\begin{document}
\begin{tikzpicture}
\matrix[matrix of nodes,nodes={scale=0.25,inner sep=0pt,outer sep=0pt},column sep=0pt,row sep=0pt]{
\includegraphics{example-image-a} & \includegraphics{example-image-b} &\includegraphics{example-image-c}\\
\includegraphics{example-image-b} & \includegraphics{example-image-c} &\includegraphics{example-image-a}\\
\includegraphics{example-image-c} & \includegraphics{example-image-a} &\includegraphics{example-image-b}\\
};
\end{tikzpicture}
\end{document}