This is a first attempt at native upscaling with FLUX NF4 that just released (native in a sense that it uses Flux instead of SDXL, SD1.5 etc.). it is a 2 iterative upscale workflow. If you get memory allocation errors, bypass the second up-scaling column so it skips the 3rd pass. I use 12gb vram for this workflow.

If you prefer using Dev i would suggest still using NF4 upscaling for a speed increase.

flux NF4 download: https://huggingface.co/lllyasviel/flux1-dev-bnb-nf4/blob/main/flux1-dev-bnb-nf4.safetensors

Got any questions you can catch me in my discord server: https://discord.gg/kt2hCJHuKp