港大&腾讯重磅开源：用相机射线重构Attention位置编码，给世界模型换上「3D坐标系」！单图WASD复杂轨迹漫游，FVD降43%

TL;DR - SCoPE injects camera-ray geometry into video diffusion Transformer attention, enabling more accurate camera-controlled world exploration without explicit 3D reconstruction. On Wan2.2-14B, it cuts rotation error by 29% and FVD by 43% while adding under 0.1% parameters.

• Represents each video token’s viewing ray with Plücker coordinates and injects projected ray features into attention queries and keys.
• Jointly scores visual similarity and geometric compatibility while retaining the pretrained model’s existing 3D RoPE and content projections.
• Normalize-Gate-Inject separates ray direction and scale to accommodate camera poses from calibration, SfM, or SLAM.
• Improves complex WASD trajectories and closed-loop revisits across Wan2.2 5B and 14B models.