MINIMAX H3 turns 3D clay renders into cinematic videos.

Who it's for: creators who want this pipeline in ComfyUI without assembling nodes from scratch. Not for: one-click results with zero tuning - you still choose inputs, prompts, and settings.

Open preloaded workflow on RunComfy

Open preloaded workflow on RunComfy (browser)

Why RunComfy first
- Fewer missing-node surprises - run the graph in a managed environment before you mirror it locally.
- Quick GPU tryout - useful if your local VRAM or install time is the bottleneck.
- Matches the published JSON - the zip follows the same runnable workflow you can open on RunComfy.

When downloading for local ComfyUI makes sense - you want full control over models on disk, batch scripting, or offline runs.

How to use (local ComfyUI)
1. Load inputs (images/video/audio) in the marked loader nodes.
2. Set prompts, resolution, and seeds; start with a short test run.
3. Export from the Save / Write nodes shown in the graph.

Expectations - First run may pull large weights; cloud runs may require a free RunComfy account.

Overview

Turn simple clay renders into polished MINIMAX H3 videos. You keep your scene's composition, geometry, and motion. Add lifelike materials and cinematic lighting. Build rich environments and fine details. You stay in creative control. Get film-ready animation faster.

Important nodes:

Key nodes in ComfyUI 3D AI Rendering with MINIMAX H3 workflow

MiniMaxH3Resolution (#121)

Determines a safe, native width and height from your reference so H3 lands on its aspect grid. Change aspect ratio by changing your clay input rather than forcing custom sizes. If you must deviate, keep to grid‑aligned values to avoid flicker.

VHS_LoadVideo (#30)

Ingests the clay pass that drives structure. For reliable motion lock, supply a 24 fps source and avoid resampling inside the node. If timing drift appears, re‑export your clay pass at 24 fps and ensure the workflow’s snapped length matches the clip.

MiniMaxH3ReferenceToVideo (#45)

The central renderer that merges prompt, look plates, the reference video and optional voice into video and audio latents. Keep the <Video 1> and <Picture 1> tags in the prompt so the model binds to the correct inputs. For dialogue, route your voice track into the node’s reference‑video audio input so lip movements align with speech.

LoraLoaderModelOnly (#16)

Applies the 4‑step Turbo LoRA for fast, sharp previews. Use it for exploration and dailies. When you need a gentler look or the closest match to the clay pass, disable the LoRA and render with a multi‑step schedule in BasicScheduler (#58) and KSamplerSelect (#59).

BasicScheduler (#58) and KSamplerSelect (#59)

Control how noise is removed over time, which affects texture sharpness, motion smoothness and fidelity to the clay pass. Low‑step schedules pair well with the Turbo LoRA for speed, while multi‑step schedules without the LoRA emphasize accuracy and a softer finish. If a result looks over‑sharpened, try a different sampler strategy and more steps.

VAEDecodeAudio (#68)

Decodes the generated audio latent. Pair it with AudioAdjustVolume (#69) if your mix needs a quick level change before muxing in CreateVideo (#70). For clean dialogue, pad your source voice to the exact clip length to avoid repeats.

Notes

3D AI Rendering with MINIMAX H3 | Clay-to-Cinematic Video - see RunComfy page for the latest node requirements.