Helix4D: Complex 4D Mesh Generation

Researchers introduced Helix4D, a video-conditioned 4D mesh generation framework built on Trellis2.

It adds sliding-window cross-frame attention and a parameter-free 4D temporal encoding to model motion over time.

Helix4D reported strong performance on challenging dynamic benchmarks, including scenes with topology changes, transparency, and thin structures.

The approach preserves the quality of the pretrained 3D model while extending it to more complex 4D reconstruction.