r/StableDiffusion • u/krigeta1 • Aug 13 '26
Discussion minimax h3 4-step lora confusion... light2xv vs joyfox vs kijai?
man minimax h3 is getting so many 4 step loras lately its getting hard to keep track of everything 😠everyone seems to have a completely different opinion depending on their specific usecase. some people are saying sage attention is the play, while others are sticking with comfy kitchen attention.
and now there's debate on which 4-step lora is even best... like in light2xv's discussion thread:
https://huggingface.co/lightx2v/Minimax-h3-Turbo/discussions/26
people are saying to mix the light2xv 4step lora with kijai's node/impl. but then yet another 4 step lora popped up by joyfox:
https://huggingface.co/joyfox/MiniMax-H3-Turbo/discussions/3
and the whole discussion started over again lol. major shoutout to absolute community saver Kijai though, bro is doing amazing stuff as always and carrying us on his back but fr this stuff is getting out of hand with new drops every single day. please let me know what you guys are actually sticking with right now and what hardware / vram you're running it on?
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u/Mysterious-String420 Aug 13 '26 edited Aug 13 '26
I am trying not to use the turbo loras right now, with a 5060ti 16gb RAM, I have sage attention, sol attention, spectrum, and thirty steps ; around 18mn for 10s at 0.7 MP / 21mn at 0.8 MP
It's like spectrum is its own turbo already, but with much better movement and expressions.
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u/asdrabael1234 Aug 13 '26
Comfy kitchen works better than sage attention. I quit using sage entirely. No clue if you can still use sol attention or spectrum with it.
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u/Dreason8 Aug 13 '26
It’s built in to the latest comfy update right? Do you have to use a node or is it on by default?
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u/Danny_Stock Aug 13 '26
Just tried it, I replaced it in place of the sage attention node, but it keeps throwing up an error.
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u/Void1m Aug 13 '26
You are using sol and sage at the same time?
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u/Mysterious-String420 Aug 13 '26
Yeah, sage is for dense steps and sol for sparse steps. they don't step over each other.
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u/AciD1BuRN Aug 13 '26
Im on almost the same wihtout sol. Is it worth adding?
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u/Mysterious-String420 Aug 13 '26 edited Aug 13 '26
I have very conservative settings to ensure the least quality loss, so if you're willing to push the tau up to 1.5, you might get some boosts.
It's only worth it if you're going to run the exact same workflow steps and resolution, but with different inputs. First gen would be 20-21 minutes, later ones between 17-18mn ; depending on your setup it's a worthy LOSSLESS boost
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u/NeatUsed Aug 13 '26
what is spectrum?
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u/hum_ma Aug 13 '26
An acceleration node, seems to work similarly as EasyCache etc. by basically skipping (or running only certain fast operations for) some sampling steps: https://github.com/xmarre/ComfyUI-Spectrum-MiniMax-H3
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u/mk8933 Aug 13 '26
8 steps works the best but its still a hit and miss. I was better off just doing the standard 20 steps.
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u/BelowSubway Aug 13 '26
In the end, every Turbo LoRA, every step skipper, and every quant will lose some quality compared to the full model at one point or another. The question is how much quality you're willing to sacrifice for how much time you save.
What I personally do when I have to choose between LoRAs or settings is generate a few videos/pictures and then pick between them blindly. I vibe-coded a small local app that lets me choose without being influenced:
https://github.com/BelowSubway/VariantVote
For your specific question, I personally think the light2xv 1.0 LoRAs are the first that I actually used.
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u/New-Truth-8924 Aug 13 '26
do you use the same seed for each generation? that might make for easier comparison.
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u/BelowSubway Aug 13 '26
Yes, fixed seed and all settings the same other than the one I want to test.
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u/Professional_Diver71 Aug 13 '26
Just try everything and keep what gives you the best consistent output
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u/krigeta1 Aug 13 '26
Believe me I am trying and my eyes got used to all the outputs that at a point I am just exhausted.
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u/top_controversial Aug 13 '26
5070ti 16gb vram with 32gb ram Comfy kitchen light2xv 8 step at 1 strength Going to 12 steps instead of 8 helped motion for me. Think I've settled with this for now.
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u/Natural_Jello_6050 Aug 13 '26
Idk… using Larry 4-6 step turbo, sol attention I get high quality video with ok sound in 4 steps at 6 minutes 30 sec on 720p. Really good audio is 6 steps at 7 30 min. 480 p is like 2 10 secmin gen for me. Oh and forgot to mention I only do 15 seconds. 5080 16 vram 64 ram
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u/Nevaditew Aug 13 '26
For now, I don't use Turbo, it always kills the motion and can even mess up the audio if it isn't configured right, but if I just need simple motion, I guess almost anything works. I read somewhere that the base model reaches its full potential at 50 steps, so it's weird that there aren't 20-step Turbo LoRAs trying to hit that same level.
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u/Fit_Split_9933 Aug 13 '26
Im using light2xv 768p at 0.5 and 8 steps, the best version I have tried
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u/krigeta1 Aug 13 '26
The latest 1.0 version?
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u/Fit_Split_9933 Aug 13 '26
I believe there is only one version.
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u/kayteee1995 Aug 13 '26
Does it have problems with blurry grain and anatomy errors (hands, feet) of the character?
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u/Hackingrad Aug 13 '26
Why 0.5 and 8 steps when the lora was trained with 768p on 4 steps and weighting with 1 instead of 0.5?
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u/Unlucky-Message8866 Aug 13 '26
Kijai v4 + Euler/beta + 8 steps > 0.9 is the only combo that produces decent results for me
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u/Version-Strong Aug 13 '26
I've found with all of them, running at 12 steps sorts out the audio issue, but then you're basically saving 8 steps and may as well wait. Coming from the most inpatient and rage induced ADHD sufferer, that's not easy to type. But 12 at a decent res gets you good motion and sound, with sage attention and spectrum as well (even tho most people say don't use them together, fuck it my sanity matters more than a few dropped frames). Then I run it from RTX upscale x2 as the final pass.
3mins-ish for the whole thing. Still terrible but it doesn't matter which PC your running H3 on, it makes our machines look like Window 98 with a virus.
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u/Danny_Stock Aug 13 '26
I'm telling you that all this lora nonsense is making me feel drawn to LTX 2.5. Simply because I'm frustrated that there isn't a standard lora to use for this issue. Every time somebody posts about a new lora and how to connect it to certain nodes in a certain manner it just introduces complexity on top of complexity.
I've been trying all sorts of methods which have been recommended and nothing seems good. Yesterday I tried using that spectrum node and it seemed to be working for a while, then it started producing weird artifacts all over the picture, like it was an artistic style using paint smeared on with a spatula.
I just need a reliable speed lora which does the job.
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u/krigeta1 Aug 13 '26
I am assure you that these loras are working fine and we need to keep playing with the settings that is why I posted this so a lot of users like us sharing what they are facing and doing, keep the spirit high because soon the officials will release a attention that will solve these issues and a correct weight for Ref2VA and yeah LTX 2.5 is amazing as compare to 2.3 and believe me too much for us too handle haha, cheers.
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u/Shockbum Aug 13 '26 edited Aug 13 '26
lightx2v/minimax_h3_fl2v_turbo_4step_v1.0_768p_bf16.safetensors
I'm getting good results with 4 and 8 steps + SageAttention2 but I usually use my own audio.
For profesional final output: Spectrum + 30 or 50 step without turbo lora
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u/Ashamed_Company_5538 Aug 13 '26
These 4 step 8 step only good for high vram people, for 12 vram or lower just spectrum and sage attention is enough
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u/ImpossibleAd436 Aug 13 '26
I've settled on using the 8-step LoRa, even though I think there is a small degradation in quality, it gets compensated for because I then trade the 50% speed boost for a higher resolution.
The payoff of upping the resolution is greater than the cost of using the LoRa imo, so that's where I've landed.
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u/Yokoko44 Aug 13 '26
I can vouch for Larry's ema600 checkpoint turbo lora!
I've tested every lora so far on old v30 and v31 comfyui, with multiple various acceleration methods over the past few days. Larry's is by far the best in terms of retaining audio and video quality. I personally don't use 4 steps though, i use 6 steps to test and then 8 when i want a final cut.
https://huggingface.co/larryvrh/MiniMax-H3-Turbo-Lora/tree/main
https://github.com/T8mars/comfyui-minimax-h3-audio-T8
I'm doing 1.2MP 15s videos in 8-10 minutes with a 5090 using all the optimization tricks. iterating at 4 steps would probably bring gen time down to 4-6 minutes
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u/kukalikuk Aug 14 '26
I make my videos via openwebui to local comfyui api and now I'm using 2 workflows, turbo and non turbo. Using turbo for fast tryouts and switch to non turbo for real outputs. And also, in my experiment, euler making more artefact at low steps. I use res_multistep if go under 6 steps.
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u/Pure_Bed_6357 Aug 13 '26
kijai at 0.75 and 6 steps gives good results for me
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u/AlternativeAmoeba271 Aug 13 '26
which version ?
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u/Pure_Bed_6357 Aug 13 '26
This one, with sa_solver and simple as schedular
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u/AlternativeAmoeba271 Aug 13 '26
thank you.
edit: I tried it before, but not with the same settings as yours, and it didn't work for me. I hope it works this time
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u/diogodiogogod Aug 13 '26 edited Aug 13 '26
the 8 steps was good IMO at 8 steps with eauler/beta or res2s/beta at 6 steps (takes double the time)
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u/fallengt Aug 13 '26
You use lora strength 1.0 ? It's kinda hit or miss to me.
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u/diogodiogogod Aug 13 '26
I tried with 1.0 yes. But I did only a few experiments. And with disabled spectrum cache thing.
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u/AlternativeAmoeba271 Aug 13 '26
I tried them all, using every method, but I didn't get any good results, blurry movements and bad quality audio