Miscellaneous minor improvements.

packages/Graphics.sty

@@ -75,31 +75,54 @@
 	}%
 }
 
-\newlength{\twinfigwidth}
-\setlength{\twinfigwidth}{\textwidth / 2 + \bigfloatoverhang}
+\RequirePackage{tabularray}
+
+\providelength[3pt]{\twinfigspace}
+\providelength[
+	\textwidth / 2 + \bigfloatoverhang - \twinfigspace
+]{\twinfigwidth}
 
 \newcommand{\twinfig}[7][\bigfloatoverhang]{%
-	\bigfloat[#1]{figure}{htp}{%begin{table}[htp]%
-		\begin{tabular}{*{2}{p{\twinfigwidth}}}%\begin{tblr}{Q[l,m]Q[l,m]}%
-			\vfill%
+	\bigfloat[#1]{figure}{htp}{%
+		\begin{tblr}{%
+			colspec	= {%
+				*{2}{%
+					Q[%
+						c,%
+						m,%
+						wd=\twinfigwidth,%
+					]%
+				}%
+			},%
+			vborder{1,Z} = {
+				leftspace	= 0pt,%
+				rightspace	= 0pt,%
+			},%
+			vborder{2} = {%
+				leftspace	= \twinfigspace,%
+				rightspace	= \twinfigspace,%
+			},%
+		}%
+			\vfill
 			\captionsetup{type=figure}%
 			\includegraphics[%
 				keepaspectratio,width=\twinfigwidth%
 			]{#2}%
 			\captionof{figure}{#4}%
-			\label{fig:#3}%
+			\label{fig:#3}
 			\vfill%
 			&%
-				\vfill%
+				\vfill
 				\captionsetup{type=figure}%
 				\includegraphics[%
 					keepaspectratio,width=\twinfigwidth%
 				]{#5}%
 				\captionof{figure}{#7}%
-				\label{fig:#6}%
+				\label{fig:#6}
 				\vfill%
-		\end{tabular}%\end{tblr}%
-	}%\end{table}%
+			\\%
+		\end{tblr}%
+	}%
 }
 
 \newcommand{\wrapfig}[6][0in]{%