<h1 id="minimax-h3-longforge-fl2va-and-ref2va">MiniMax H3 LongForge — FL2VA &amp; REF2VA</h1><h3 id="support-the-project">Support the project</h3>If LongForge helps you, you can support future development through the Tip button on my Civitai profile or an optional donation:USDT · TRON (TRC20)<code>THLU3yu8VpoPqP4bMLCp86FRhoCweJ2Qz4</code>Please send only USDT through the TRON (TRC20) network. Thank you!One workflow for generating, continuing and exporting long videos with synchronized audio in ComfyUI.LongForge carries saved video and audio latent context between scenes to help preserve motion, appearance, camera movement and ambience. Everything stays in one editable graph, with visible model loaders and manual controls.<h3 id="two-generation-modes">Two generation modes</h3><ul><li>FL2VA — text-to-video, image-to-video, and optional first/last-frame guidance.</li><li>REF2VA — image, video and audio references: up to 9 images, 3 videos with paired soundtracks, and 3 standalone audio references.</li></ul>Switch modes inside the same workflow and select the appropriate H3 model.<h3 id="main-features">Main features</h3><ul><li>One scene editor: add prompts with + Scene.</li><li>Flexible generation: process one scene or all pending scenes.</li><li>Automatic continuation: each new scene starts from the saved film end.</li><li>Saved projects: reopen and continue your film later.</li><li>Scene regeneration: replace a selected scene and rebuild its continuation.</li><li>Manual settings: resolution, frames, overlap, steps, sampler, scheduler, CFG and seed.</li><li>Two optional LoRA loaders: use either, both, or leave them on <code>NONE</code>.</li><li>Visible attention patches: KJ Sage Attention and MiniMax H3 Memory Efficient Sage Attention.</li><li>Fragment previews and full-film export in the same graph.</li></ul><h3 id="download-and-installation">Download &amp; installation</h3>Download both archives:<ul><li>ComfyUI-H3-LongForge-NodePack.zip — required custom nodes and installation README.</li><li>H3_LongForge_FL2VA_REF2VA_PROMPT_GUIDE.zip — the workflow and one Russian/English prompt guide.</li></ul><ol><li>Extract the node-pack folder into <code>ComfyUI/custom_nodes/</code>.</li><li>Follow its README to install dependencies. The supplied graph requires native MiniMax H3 support, ComfyUI-KJNodes and compatible SageAttention.</li><li>Restart ComfyUI and open <code>H3_LongForge_FL2VA_REF2VA.json</code>.</li><li>Select your diffusion model, text encoder, video VAE and audio VAE. Choose optional LoRAs and enable any image loaders you need.</li></ol>Models DiT: <a target="_blank" rel="ugc" href="https://huggingface.co/Comfy-Org/MiniMax-H3/tree/main">Comfy-Org / MiniMax-H3</a>Text Encoders: <a target="_blank" rel="ugc" href="https://huggingface.co/ethanfel/Qwen3-VL-32B-Ultra-Heretic-H3-ComfyUI-INT8-ConvRot/tree/main">INT8 ConvRot </a>or <a target="_blank" rel="ugc" href="https://huggingface.co/sakamakismile/Qwen3-VL-32B-Heretic-MiniMax-H3-NVFP4/tree/main">NVFP4</a>Other Custom Nodes: <a target="_blank" rel="ugc" href="https://github.com/kijai/ComfyUI-KJNodes">ComfyUI-KJNodes</a> — required only for SAGE Attention and MiniMax H3 Memory Efficient Sage Attention.<h3 id="generate-your-film">Generate your film</h3>Write one prompt per scene. A simple structure works well:<pre><code>VIDEO: Describe the subject, action, setting and camera.
SOUND: Describe ambience, effects and dialogue.
MUSIC: No music.</code></pre>These headings are optional. The included guide explains both modes, continuation prompts and reference numbering.In REF2VA, use native markers such as <code>&lt;Picture 1&gt;</code>, or optional names such as <code>{hero}</code>. References can apply to the first scene or every scene.Choose GENERATE NEXT and press Run to generate. When ready, choose EXPORT FILM and press Run to assemble the saved scenes into one MP4 with audio.<h2 id="optional-final-post-processing">Optional final post-processing</h2>If additional upscaling or frame interpolation is required, process the completed video afterward with:<a target="_blank" rel="ugc" href="https://github.com/Merserk/dlss5-visual-enhancer">DLSS 5 Visual Enhancer</a>It supports RTX Video Super Resolution, DLSS Neural Rendering, and optional frame generation. It is a separate application and is not required for these ComfyUI workflows.<a target="_blank" rel="ugc" href="https://github.com/Merserk/dlss5-visual-enhancer/releases">Download DLSS 5 Visual Enhancer</a>My Telegram channel:<a target="_blank" rel="ugc" href="https://t.me/aibobpublic">https://t.me/aibobpublic</a>

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