# Interactive 3D Reconstruction

Feed-forward stereo 3D reconstruction predicts dense pointmaps in one pass and offers no way to correct a wrong result. Click3R inserts a lightweight point-correspondence adapter ahead of DUSt3R's decoder, injecting a handful of user-supplied cross-view point pairs as geometric constraints without test-time fine-tuning or optimization. On the curated Hard3DBench, a single correspondence click reduces reconstruction error; in a 100-pair human-labeling test, median rotation error fell from 17.30° to 8.78° and mAA@30 rose from 36.2 to 56.2.

Feed-forward stereo 3D reconstruction predicts dense pointmaps in one pass and offers no way to correct a wrong result. Click3R inserts a lightweight point-correspondence adapter ahead of DUSt3R's decoder, injecting a handful of user-supplied cross-view point pairs as geometric constraints without test-time fine-tuning or optimization. On the curated Hard3DBench, a single correspondence click reduces reconstruction error; in a 100-pair human-labeling test, median rotation error fell from 17.30° to 8.78° and mAA@30 rose from 36.2 to 56.2.