Example of 3 x 4 panels with a figure caption underneath.
\begin{figure}
\centering
\subfloat[][%option: caption of this panel]
{\label{fig:neutral_a_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure1.png}} \quad
\subfloat[][]
{\label{fig:neutral_b_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure2.png}} \quad
\subfloat[][]
{\label{fig:neutral_g_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure3.png}} \\
\subfloat[][]
{\label{fig:srs_a_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure4.png}} \quad
\subfloat[][]
{\label{fig:srs_b_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure5.png}} \quad
\subfloat[][]
{\label{fig:srs_g_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure6.png}} \\
\subfloat[][]
{\label{fig:dev_a_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure7.png}} \quad
\subfloat[][]
{\label{fig:dev_b_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure8.png}} \quad
\subfloat[][]
{\label{fig:dev_g_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure9.png}} \\
\subfloat[][]
{\label{fig:rand_a_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure10.png}} \quad
\subfloat[][]
{\label{fig:rand_b_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure11.png}} \quad
\subfloat[][]
{\label{fig:rand_g_tpl}
\includegraphics[width=5.2cm,height=4.5cm]{figure12.png}} \\
\centering
\caption{\label{fig:realshape}}
\end{figure}
