For 3D scene generation in irregular spaces, hierarchical placement strategies and statistical priors about object distributions significantly improve physical plausibility and reduce geometric violations compared to flat optimization approaches.
This paper tackles text-to-3D indoor scene generation in non-Manhattan (non-rectangular) spaces, where existing methods fail. SPG-Layout uses statistical priors about object placement and hierarchical layout strategies (placing large objects first) to generate physically realistic scenes that respect non-orthogonal spatial relationships.