OptiScene: LLM-driven Indoor Scene Layout Generation via Scaled Human-aligned Data Synthesis and Multi-Stage Preference Optimization - Yang, Yixuan; Luo, Zhen; Ding, Tongsheng; Lu, Junru; Gao, Mingqi; Yang, Jinyu; Sanchez, Victor; Zheng, Feng (Advances in Neural Information Processing Systems, 2025)