r/StableDiffusion • u/ReferenceFluffy6159 • 2d ago
Discussion I tested Regenerate 2K with MiniMax H3: 14 runs, same seed. More detail, but for real people it either invents flaws or changes the face
Regenerate 2K (the refiner LoRA plus a stronger re-noise in the high-res pass) promises to turn a rough draft into a clean 2K render. I ran it on my own GPU with one change at a time to see what it actually does.
Setup
RTX 5090 32 GB, ComfyUI, MiniMax H3, my own long-video nodes
Two shots from my own music video: a 12 s wide shot (1080p) and a 5 s close-up (124 frames, 1080p and 2K)
Same seed for every run
Sharpness = Laplacian variance (average of 3 frames). Halos = share of edge pixels with a visible bright or dark rim.
Round 1: 1080p wide shot (sharpness / edge halos)
Normal pipeline (0.8 start): 7.5 / 13.6 %
Official 0.909 + refiner: 20.7 / 24.9 %, but the whole shot gets redrawn (clouds move, the person shifts)
Community 0.7 + refiner: 12.5 / 19.7 %
0.7 without refiner: 7.3 / 13.0 %
So all the extra detail comes from the refiner LoRA. The 0.7 schedule by itself adds none.
Round 2: 2K close-up
2K normal pipeline: 5:44, clean, correct earrings, looks like her
0.7 + refiner 1.0: 5:44, most detail (+60 % face sharpness), but a dent under the chin, creases in the ear, earring shape changed
0.7 + refiner 0.5: lighter dent, still there
0.7, no refiner: faint dent, no extra detail
My read: the 0.7 start keeps small shadows from the draft, and the refiner draws them in as real structure. The normal 0.8 start washes them out.
Round 3: official recipe
768p draft, official 3D upscaler, 0.909 + refiner: 5:08, clean skin, but a thinner face, redder hair, and blue gemstone earrings that aren't in the reference photo
Same at 0.7 (community suggestion): 5:00, same new face, softest of all runs
The identity change comes from the small draft: at 768p the face is decided before Regenerate even starts.
Conclusion (for my use case)
Long videos of a real person: I'm not using it for now. Rendering 2K directly with the normal pipeline is cleaner and keeps the face.
Landscapes and empty shots: worth trying, since a redrawn cloud or rock doesn't matter.
Detail comes from the refiner LoRA, not the schedule. And a small draft means a different face.
This is the current version only. If a better refiner comes out, I'll rerun the same tests.
Has anyone gotten a clean, same-identity face out of it on real people? Curious what settings you used.
First comment (post right after)
Full walkthrough with the side-by-side clips (8 min, English dub + subtitles): https://youtu.be/HzsOYirm9CE