IGGT: Instance-Grounded Geometry Transformer for Semantic 3D Reconstruction - 李, 昊; Zou, Zhengyu; Liu, Fangfu; xuanyang, zhang; Hong, Fangzhou; Cao, Yukang; LAN, Yushi; Zhang, Manyuan; Yu, Gang; Zhang, Dingwen; Liu, Ziwei (International Conference on Learning Representations, 2026)