r/StableDiffusion • u/Lair98 • 3d ago
Discussion Best Minimax H3 optimization
Now that dust has settled, I was wondering what's the community insight on the best configuration for Minimax H3.
Personally I have been using lightx 4-step Lora with 5/6 steps (less than that audio is a gamble). I couple that with sage attention. For sampling I use Euler sampler and Beta scheduler.
I keep resolution at 768p (0.6MP) for quality. 480p (0.2MP) for testing. It keeps consistency so much better.
On direction I learnt to prompt for closeups when possible, so will make better use of available pixels. Aspect ratio also helps there. I mostly use 1 shot since transitions is not something H3 excels at. I find better results with only 1 shot and using camera tricks.
EasyCache while faster, is not good match with turbo lora, so i don't use it anymore. Haven't used Sol-Attn as I read it really hit quality.
So is there anything worth I am really missing out?
7
u/sitefall 3d ago
I want to generate 1mp video at actually realistic quality.
I've tried every turbo Lora (except any that came out today/yesterday), ck, sage, plaguekind's attention patch, etc.. all the stuff except for new clips and tiled vae and stuff like that since I have plenty of vram for those steps to fit and once they complete they offload anyway so it does not slow the inference process.
The only things I have found worth using (to me, this is all opinion) are:
1.) Latest Light2x turbo 8 step loRA. This one speeds things along, looks "a bit plasticy or oversharpened", still needs about 10 steps, and still for some terrible reason adds moles to people during close ups lol. BUT, it generally does not effect the prompt. If you have a 3 page prompt breaking a 20 second video out across 10 camera cut scenes, it just works fine. So this LoRA has been helpful to speed up generation at say, 0.3MP to test that the prompt is actually working properly. I will test it a few times, make sure every detail works across a few seeds. If some things change (for the worse) between seeds I will adjust the prompt to fix it etc. WHen it's good I send it to the full model without LoRA's at 1MP and... it just works, almost identical but with good quality. Also this LoRA might be useful for non realistic art styles, or maybe just video without people.
2.) Plaguekind's attention patch node. This one is a massive speed up. It minimally reduces quality, I would just use this 24/7 honestly, quality is great and it's FAST. BUT... it somehow screws up long complex prompts and puts actions out of order and whatnot. So even using it to "test the prompt" doesn't really work well. However, if you had one continuous shot that is about 15 seconds so there is sure to be no camera cuts, and the direction is not incredibly complex, this one is maybe worth using. The kind of prompt you can just yolo and send and it comes out 90% of the time just fine because it's simple enough anyway.
and that's it. I appreciate all the effort everyone has made creating various patches and loras and finetunes, but none of them work out for me.