\begin{figure*}[t]
\begin{center}
% \vspace{-4mm}
\includegraphics[width=\linewidth]{assets/main/overview.pdf}
\end{center}
%\vspace{-4mm}
\caption{\textbf{Overview of TAS-GS.}  
(a) Gaussian Graph Construction: To address sparse inputs, we build a graph with geometric and appearance attributes for a unified representation. (b) Topology-aware Geometric Refinement: Under sparse supervision, we prune floaters, reconnect components, and fill holes to ensure coherent geometry. (c) Appearance Propagation: A GNN propagates appearance features across neighborhoods to resolve texture ambiguity after geometric stabilization. (d) Semantic Modulation: We apply modulation to underrepresented regions to sharpen contours and preserve fine details.}
  
%\vspace{-4mm}
\label{fig:overview}
\end{figure*}