# Ablation

## Ablation on Trajectory Representation.

Without trajID, accurate trajectory control fails due to ambiguous correspondences.
Without segID, newly emerging regions are generated randomly; With segID, they follow the segmentation but lose appearance cues; with all attributes, generation matches the GT.

## Ablation on Condition Injection.

ControlNet-style injection provides limited control, whereas ours achieves accurate motion.

## Ablation on Training Strategy.

Random mixing or reversed schedules degrade performance, while our annealing strategy preserves accurate alignment.