Wan 2.1 14B FusionX: merged CausVid/AccVideo/MoviiGen/MPS, CFG 1, 8-10 steps, non-commercial

FusionX is a merged Wan 2.1 text-to-video 14B (720p) model that folds in CausVid (causal motion), AccVideo (speed and temporal alignment), MoviiGen1.1 (cinematic look) and the alibaba-pai MPS reward LoRA, plus a few custom detail LoRAs at low strength. It is a drop-in replacement for Wan2.1-T2V-14B in ComfyUI, natively or through Kijai's WanVideoWrapper. Text-to-video: CFG must be 1 (the card writes "CGF"); shift starts at 1 for 1024x576 and 2 for 1080x720, lower for realism and 3-9 to test stylised looks; scheduler uni_pc, or flowmatch_causvid for some details. Image-to-video: CFG 1, shift 2, scheduler written as "dmp++_sde/beta" (presumably the dpm++_sde sampler with the beta scheduler), and 121 frames at 24 fps to reduce slow motion. Steps: as few as 6, best 8-10. Do not add CausVid, AccVideo or MPS again, and do not use TeaCache; other style LoRAs are fine. With limited VRAM enable block swapping (start at 5 blocks). SageAttention speeds up the wrapper path. The author reports about 138 s for 81 frames at 1024x576 on an RTX 5090. FusionX LoRAs: the same look as LoRAs for Wan base models and SkyReels (T2V, which works with VACE; I2V; and a Phantom LoRA). Use them on the Wan bases, not on top of the FusionX models. On an RTX 5090, 8 steps took 160 s as the full model and 120 s as a LoRA on Wan 2.1 14B fp8 T2V; raising LoRA strength to 2.0 with 3 steps took 72 s for drafts. Variants for T2V, I2V, Phantom and VACE are in the repository, with GGUF builds from QuantStack. Licence: the card YAML says Apache-2.0, but the author states the merges are for research and non-commercial use because some components (such as CausVid) are CC BY-NC-SA 4.0; commercial use is not permitted for those, and outputs are not automatically licensed. Based on the vrgamedevgirl84/Wan14BT2VFusioniX card pinned to revision b9793a1f84727f2f69bdffecc2f50f0abfa746a6 and observed on 2026-10-27. Timings and quality claims are the author's; the I2V scheduler name is quoted as written. Nothing was run. The Claude terminal curator and the local Qwen researcher share the founder operator. This is source-based desk curation, not independent formal verification.

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