Flux.1 - Slower Upscaling - aka "Look Ma, no bands!"

video - https://youtu.be/9zdcB7A_TJA

Well, this took a long time to test! During testing found a few things, which I split into 3 sections.

1. IMG2IMG "Trick"

Don't have the VRAM for a controlnet, or simply want a new way to do IMG2IMG? Then try ddim_uniform along with Hyper and a denoise of 1.0! Yes, I know it shouldn't work but it does, so now it's a thing :)

2. Non-Fast Upscaling

If you don't care how long upscaling takes, then there are a bunch of options... and I tested a lot of them. Long story short, try a hyper with a double dual sampler config and then an ultimate upscale at around 0.25 denoise (or just a plain model upscale if you don't have all day). It's my personal favourite right now, but that pyramid noise is tempting me too!

3. Nice Vision LLM

I've been "chatting" a lot with MiniCPM-V recently and found it's pretty good! Better than Llava and Florence for me, so maybe worth a try!

https://ollama.com/library/minicpm-v

ollama pull minicpm-v

Attachment info

Workflows used in the video are attached to this post. Here is a quick summary of what they do!

Flux_Dev_IMG2IMG_Hyper_v0.json = Simple Flux IMG2IMG + Hyper. A quick way to test the IMG2IMG trick!

Flux_Dev_IMG2IMG_Hyper_2SamplerHRF_LLM_v0.json = Flux IMG2IMG + Hyper + double dual sampler HRF upscale + optional LLM. This is the one for "everyday use".

Flux_Dev_IMG2IMG_Hyper_HugeCompare_v0.json = Flux IMG2IMG + Hyper + Loads of HRF options + optional LLM. Not for "everyday use", but for comparing. Nerds only! ;)

ComfyUI Manager Info

If "install missing nodes" fails somehow, these are the custom nodes packs used:

Impact Pack = ID 2

WAS Node Suite = ID 25

Extra Models for ComfyUI = ID 53

ComfyUI-GGUF = ID 54

UltimateSDUpscale = ID 71

Comfyroll Studio = ID 81

rgthree's ComfyUI Nodes = 175

ComfyUI Extra Samplers = ID 241

Use Everywhere (UE Nodes) = ID 247

🐰 MaraScott Nodes = 625

comfyui_LLM_party = ID 905

AuraSR-ComfyUI = ID 1104

Extra Model Info

Optional CLIP = https://huggingface.co/zer0int/CLIP-GmP-ViT-L-14

Shakker Labs = https://huggingface.co/Shakker-Labs

Hyper-SD = https://huggingface.co/ByteDance/Hyper-SD

AuraSR = https://huggingface.co/fal/AuraSR-v2

Update - Custom Sampler Supreme Edition (testing)

rk4 seems to smooth things out, which may help with boxes / banding. The attached workflow gives above 2k, for example - Flux_Dev_IMG2IMG_Hyper_2SamplerSupremeHRF_LLM_v0alpha.json

Still testing this one, but it takes a while at 3K+ ;)

Update - "Look, ma! No bands!" - Sampler Supreme Anti-Band 2k+

Now out of alpha, this is version 1 of the "anti-band" samplers. rk4 looks to get rid of banding (please do check, my eyes are old and so is my monitor.

Example of a typical low-res (960x1280) image with banding:

High-res (2480x2480) Anti-band example:

The downside of rk4 was it made things too smooth :/ Never mind! I figured why not just add that detail afterwards :)

Example showing the workflow in action:

Now attached:

Flux_Dev_IMG2IMG_Hyper_LLM_AntiBandUpscale_v1.json