<h1 id="what's-new-in-v3.0">What's new in v3.0</h1><h3 id="adds-rife-frame-interpolation-before-the-ltx-refine-pass-fixes-ghostingwarping-artifacts-on-fast-motion-or-action-shots-by-halving-the-per-frame-motion-delta-the-video-vae-sees.">Adds RIFE frame interpolation before the LTX refine pass — fixes ghosting/warping artifacts on fast-motion or action shots by halving the per-frame motion delta the video VAE sees.</h3><ul><li>Doubles frame count + fps automatically to preserve original duration/audio sync</li><li>Fully toggleable — off falls back to previous (no interpolation) behavior exactly</li><li>Requires ComfyUI-Frame-Interpolation (Gourieff/Fannovel16 — install via ComfyUI Manager, search "Frame Interpolation")</li></ul>Adds render time (roughly doubles Stage 2 compute) — worth toggling off for calm/static shots that don't need it.Why no v2? v2 existed internally but wasn't published on its own — it was mostly under-the-hood tuning (fps/wiring fixes) rather than a real user-facing feature. Bundled those fixes into v3 along with RIFE so this jump is worth actually downloading, rather than putting out a version that's basically the same workflow with invisible changes.<div data-youtube-video><iframe width="640" height="480" allowfullscreen="true" autoplay="false" disablekbcontrols="false" enableiframeapi="false" endtime="0" ivloadpolicy="0" loop="false" modestbranding="false" origin playlist src="https://www.youtube.com/embed/I1C7-gNwqUk" start="0"></iframe></div><h1 id="what-this-does"> What this does</h1>A 2-stage ComfyUI pipeline that pairs MiniMax H3's ref2va generation (strong subject/identity fidelity from reference images, native synced audio) with LTX-2.5's fast distilled sampler as a refine/upscale pass. Built using quantized (int8) models with dynamic VRAM loading — runs comfortably on lower-VRAM cards (3060 / 4070 / 5060 class), not just high-end GPUs.Stage 1 — MiniMax H3 ref2va: generates your base clip from reference images (face/identity, outfit, environment) with native audio, exactly like MiniMax's own reference workflow.Stage 2 — LTX-2.5 refine: MiniMax's decoded frames are re-encoded into LTX-2.5's own latent space (the two models don't share a latent space, so this bridges through pixel space) and run through LTX's fast distilled sampler for detail/sharpness — either:- Native 2x upscale using LTX's own latent upscaler model, or- Custom target resolution (1920x1080, 1280x720, 1080x1920, or any arbitrary size) via a pixel-space resize before re-encodingMiniMax's original native audio is passed straight through to the final output — LTX's audio path isn't used at all.<h2 id="what's-tunable">What's tunable</h2>- Sigma schedule + video_cfg on the refine pass — trade off sharpness vs. staying faithful to MiniMax's exact output- Resolution mode toggle — native 2x model upscale vs. exact custom resolution- Full prompt/negative-prompt control on the refine pass separately from your MiniMax generation promptNot included in this version (coming later)- RIFE motion pre-interpolation — reduces motion artifacts (ghosting/warping) on fast-action shots by halving the per-frame motion delta the video VAE sees.- ReActor face-lock — locks final output identity to a reference photo, for cases where the base generation is too low-res for the refine pass to reliably hold facial identity on its own.Want early access to the upgraded version with RIFE + ReActor before public release? I'm posting it early for supporters here: <a target="_blank" rel="ugc" href="https://www.patreon.com/c/iiTzMYUNG">https://www.patreon.com/c/iiTzMYUNG</a><h2 id="requirements">Requirements</h2>- MiniMax H3 ref2va models (unet, clip, dual VAE)- LTX-2.5 models (distilled transformer, video VAE, gemma clip, x2 latent upscale model)- Standard ComfyUI, no custom node packs required for this version- Runs on 8-12GB VRAM cards (3060/4070/5060 class) thanks to int8 quantized models + dynamic VRAM loading — no high-end GPU required<h2 id="notes">Notes</h2>Built and iterated through real trial-and-error on sharpness/identity/resolution tradeoffs — the note nodes inside the workflow explain the reasoning behind each setting if you want to retune it for your own use case.

MiniMax H3 → LTX-2.5 Fast Refine/Upscale (2-Stage AV Pipeline)

v3.0 — RIFE Motion Pre-InterpolationAdds RIFE frame interpolation before the LTX refine pass — fixes ghosting/warping artifacts on fast-motion or action shots by halving the per-frame motion delta the video VAE sees.- Doubles frame count + fps automatically to preserve original duration/audio sync- Fully toggleable — off falls back to previous (no interpolation) behavior exactly- Requires ComfyUI-Frame-Interpolation (Gourieff/Fannovel16 — install via ComfyUI Manager, search "Frame Interpolation")Adds render time (roughly doubles Stage 2 compute) — worth toggling off for calm/static shots that don't need it.ReActor face-lock/restore still not included — early access via Patreon above.

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