MICW - MiniMax H3 - Modular, Intuitive & Clean Workflow (Ref2va, Fl2va & Video Continuation)

Tired of blurry fingers, noise artifacts, and messy, tangled node graphs for MiniMax H3?
This workflow is built for high-performance, rock-solid stability, and long-form video generation.

Designed specifically to run efficiently on 16 GB VRAM GPUs (like the RTX 5060 Ti) while delivering professional-grade results.

UPDATE v1.2 Changes

- Fixed Preview functionality.

UPDATE v1.1 Changes

Visuals

- Greatly simplified and cleaner layout for better readability

Fixes

- Fixed first pass metadata/info handling

- Fixed Single Pass mode (already patched in v1.0b)

- Fixed Supersample / Upscale toggle logic

- Resolved various minor bugs

Key Features

• True Dual-Pass Efficiency: Starts with an ultra-fast 0.21MP structural pass for motion and physics, followed by a 1MP latent refinement pass for crystal-clear fine details.

• Pixel-Perfect Scaling: Precise mathematical aspect-ratio alignment between passes to avoid any stretching or blur.

• Clean Patch Order: Solves hand and face jitter by maintaining mathematical headroom and utilizing a clean attention patch sequence (ModelAttentionBackend -> ModelSampling -> Chunk FF -> EasyCache).

• Motion Locked: Integrated with BetterMoveV2 LoRA for seamless camera rotations and fast character movement.

• Clean & Modular: Fully annotated, neatly organized, and free of useless node clutter.

User-Friendly Control Panel

No need to dig into complex wire webs. Control your entire generation pipeline from a dedicated, clean control panel:

• Dual-Pass & Upscale Toggles: Switch seamlessly between Latent Upscale and RTX/Supersampling upscalers depending on your GPU resources.

• First Pass Ratio Control: Easily fine-tune your structural pass ratio (0.21 by default for optimal VRAM/speed balance).

• NVIDIA RTX Post-Processing Suite: Built-in toggles for RTX Upscale, RTX Denoise, and RTX Deblur for instant video post-refinement.

• Model & LoRA Switches: Instant toggles for H3 Hybrid Model (FLV/REF), Turbo LoRAs, and NSFW LoRA.

• Seamless Scene Extension (Continue Feature): Extend your video duration continuously with a single click. Currently, the extended video clip needs to be stitched manually in your video editor (Premiere, DaVinci, CapCut, etc.). Be sure to account for the overlapping frames for a perfect transition! (Full automated video concatenation will be integrated in a future update).

• Audio & Preview Controls: Toggle real-time generation previews or mute embedded audio.

Performance Benchmark: Full 13.7s video generated in ~869 seconds (Latent Upscale Pass 1MP) on a single RTX 5060 Ti (16 GB).

Required Models & Custom Nodes

Required Models, Custom Nodes & Checkpoints

• VAE:

  • Video VAE: minimax_h3_video_vae_fp16.safetensors

  • Audio VAE: minimax_h3_audio_vae_fp32.safetensors

• Diffusion Models:

  • Base FL: minimax_h3_fl2va_pruned_fp8_scaled.safetensors

  • Base REF: minimax_h3_ref2va_pruned_fp8_scaled.safetensors

  • Hybrid Alternatives: H3 Eros Max | DaSiWa MiniMax H3

• Text Encoders:

  • Standard: qwen3vl_32b_minimax_h3_nvfp4_awq.safetensors

  • Uncensored: qwen3vl_32b_heretic_minimax_h3_nvfp4.safetensors (NSFW)

• LoRAs:

  • Turbo 4-Step FL: minimax_h3_fl2v_turbo_4step_v1.2_768p_comfyui_bf16.safetensors

  • Turbo 4-Step REF: minimax_h3_ref2v_turbo_4step_v0.1_comfyui_bf16.safetensors

  • Ref Experimental: minimax_h3_ref_lora_rank_256_bf16

  • Motion & Reasoning: H3 - LTX 2.3 VBVR | Better Motion LTX/Minimax H3

  • Style: [MMH3] Mystic XXX (NSFW)

• Latent Upscaler Model:

  • Minimax_h3_latent_Upscaler

Custom Nodes

Make sure these node suites are installed via ComfyUI Manager:

• ComfyUI-CGlide (H3 Studio)

• Comfyui_Minimax_h3_latent_Upscaler

• ComfyUI-NVIDIA-RTX-VSR-Pro

• ComfyUI-PIX_Nvidia_RTX_Deblur_Denoise

• ComfyUI-sol-attn

• ComfyUI-KJNodes

• ComfyUI-VideoHelperSuite

• ComfyUI-LogicUtils