CivArchive
    LTX 2.3 - I2V Better Physics PhysLTX - v2.0
    NSFW

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    V2: Retrained from the ground up using 10eros LTX 2.3 NSFW model as the base. Audio seems to be mostly fixed now but its quieter than baseline LTX for some reason. See the example videos to get an idea. Its not bad but not perfect. The object-to-object interactions in V2 should be noticeably improved over V1. I suggested using 10eros as your LTX model since that is what its trained on. I suggest using it at a strength of 0.7 and experiment with other strengths if needed.

    The workflow I use is https://huggingface.co/RuneXX/LTX-2.3-Workflows/blob/main/LTX-2.3_-_I2V_T2V_Basic_for_checkpoint_models.json for some reason the metadata is stripped from the vids idk why. I used LTXVImgToVideoInplace node strength of 1.0 for the videos.

    PhysLTX is a Lora that improves LTX's understanding of how objects should interact. Characters and objects show better impact, bounce and interaction physics. It reduces the weightless and floaty interactions objects and characters in LTX have with each other. If a character or object interacts with another it should noticeably be more grounded and have a sense of impact and friction. Trained on 2000 videos from the CLEVRER: CoLlision Events for Video REpresentation and Reasoning dataset

    Yes this works the same for realistic and non NSFW generations as well

    It responds well to normal prompts and prompts that describe impact and momentum. I use it at a strength of 1.0 but that can impact the audio quality for some reason, if you have audio quality issues lower the strength to around 0.7 or use a node to disable the audio influence from the Lora.

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    Description

    Retrained from the ground up on the 10eros LTX 2.3 base. Audio is mostly fixed but is quieter than default LTX for some reason.

    FAQ

    Comments (15)

    MrToonMay 17, 2026
    CivitAI

    You got now several great Lora's but some of them touch on the same thing, is this going to make your other ones on the same topic not needed anymore?

    MisticRain69
    Author
    May 17, 2026

    If you mean the multistep reasoning and reasoning loras those 2 seem to work best when stacked with each other. So think of the multi step reasoning lora as a add on upgrade to make the reasoning lora perform better.

    wigwoo1May 19, 2026· 1 reaction
    CivitAI

    Anyone got a ComfyUI workflow for this?

    MisticRain69
    Author
    May 19, 2026

    Workflow is in description

    biggchungus1337May 20, 2026· 2 reactions
    CivitAI

    Still completly ruins the audio, even at lower strength, tried everything from 0.3 to 1, and always get that metallic noise

    aaawilly136879May 21, 2026· 2 reactions

    use comfyui kjnodes ,choose LTX2 LoRA Loader Advanced to mute audio strength. It will help you.

    2be1b1d316455May 20, 2026
    CivitAI

    Does it still work on standard LTXv Model? I still prefer it over 10Eros, or should I stick to V1?

    MisticRain69
    Author
    May 20, 2026

    I have not tested it on standard LTX 2.3 you would have to test it

    TheEventHorizonMay 20, 2026
    CivitAI

    Does this do fast motion, or only slow?

    MisticRain69
    Author
    May 24, 2026· 1 reaction

    Both

    CallMeMaybeJun 4, 2026
    CivitAI

    I tried messaging you but the chat on civitai seems broken:

    I'm trying to train a nsfw concept lora for ltx2.3 using sulfur 2/10eros - I started with a dataset that worked great for training WAN, and after remaking the lora 7 different times making small tweaks and adjustments I'm still not seeing the results I want... I figured I should ask for help.

    Can you help? I'm trying to get train my Realistic Belly Bulge for WAN in LTX 2.3. I think like your lora for physics are similar in vibe to what I'm trying to train so you would have good advice.

    I've been training locally on ai-toolkit. I tried training on both LTX 2.3 and on 10eros. I've had meaningful success on 10eros in producing noticeable results for the concept, but it's not cohesive with the overall scene.

    I'm training 6000 steps with 19 videos,

    adamw8bit

    linear timestep

    1e-4 LR

    0.0001 decay

    timestep bias Balanced

    256 resolution

    I really appreciate any advice you have to offer.

    Thank you

    MisticRain69
    Author
    Jun 4, 2026· 2 reactions

    Swap from AI toolkit first. Use musubi tuner. For me its 3x faster than AI toolkit and uses 75% less memory than AI toolkit and produces higher quality loras. Bump resolution to 512x512 and train on 121 frames or more so it has enough frames and pixels to reliably learn from. LTX needs high quality data to train on and does better with more data so bump dataset to 50 clips and make sure clips are 24 fps. Make sure your captions are well detailed. They don't need to be a novel but accurately describe whats happening in the clips.

    RLS_AnimationJun 18, 2026
    CivitAI

    Great work all around 👏

    I am currently using Sulphur2. Do you recommend stacking all of your loras together? Better Reasoning, Better Breast Motion, Better Physics, Better NSFW combined (if, so what would be your suggestions on the weights?) or do you recommend focusing on one or two?

    MisticRain69
    Author
    Jun 20, 2026· 1 reaction

    The reasoning lora I have found to be universal for everything I use it for and just makes prompt following much better so I think its a good all rounder. For the other ones you have to test then out at different strengths to find what works best for your use case.

    RLS_AnimationJun 21, 2026

    @MisticRain69 Okay, thanks!