MiniMax H3 60-second seamless video workflow optimized for 12GB GPUs
vortis23 · reddit · 2026-09-08
A Reddit author built a VRAM-optimized ComfyUI workflow around j955229's H3 Motion Director node, enabling 60-second seamless multi-shot videos (text-to-video, image-to-video, reference-to-video) on 12GB GPUs at 35 min per minute of video in Turbo mode (8-step distilled LoRA) or 20-step full-precision rendering.
Key trick: a Unified Boolean Toggle syncs model weights and scheduler steps via the native strengthmodel parameter, avoiding the notorious COMFYMATCHTYPEV3 wildcard validation error. Requires ComfyUI v0.34+ plus four custom nodes (Motion Director, kjnodes for SageAttention, diffaid-patches, h3-multishot) and int8-pruned MiniMax H3 UNET, Qwen3-VL-32B text encoder, turbo LoRA, and VAE weights. Workflow JSON is downloadable from CivitAI (Mega mirror provided).
More from coding & agent
- AI Operates Lab Robot: Claude Automates Yeast Colony Picking — nlarusstone · 2026-09-08
- Open-Source Chalkboarding Skill: AI Creates Chalkboard-Style Teaching Animations — Madisonkanna · 2026-09-08
- What evidence is strong enough to rule out a step when debugging agent workflows? — Sensitive-Parsnip-12 · 2026-09-08
- Notch demos AI-generated sparse voxel octree renderer without describing a single render pass — anselm · 2026-09-08
- Production teams confront the missing piece for autonomous agents: a reversibility layer to roll back mistakes — Anxious-Variation508 · 2026-09-08
- "I have not met anyone above 100IQ who runs a gorillion agents constantly," says AI commentator — examachine · 2026-09-08