For a dialogue scene I generated clips with MiniMax-H3 , MiniMax's open-weights video model that can start from a given first frame, end on a given last frame, or both. To make one shot run longer than one clip, I started every clip from the last frame of the clip before. After ten clips the woman on screen no longer looked like the woman I had drawn:

Then I measured what each link did. People on forums describe this drift a lot ( LTX-2.3 , Wan, Seedance), but I didn't find numbers per link, so here are mine.

The setup

Model: MiniMax-H3, the first/last-frame checkpoint (FL2VA), run locally on an Apple Silicon Mac through a fork of h3.c , with an INT8 copy of the transformer and lightx2v's 8-step Turbo LoRA ( fl2v_turbo_8step_v1.0_768p ).

Every clip: 768x1344, 124 frames (5.17 s at 24 fps), 8 steps, seed 42.

Conditioning: a first frame only, no end frame. Clip 1 starts from a keyframe I drew.…