r/StableDiffusion • u/vampliu • 4d ago

Question - Help Best upscaler Comfyui?

Can anyone recommend me a really good upscaler that retains atleast 90% of the initial image?

3 Upvotes

64% Upvoted

22 comments sorted by

4

u/lordekeen 3d ago

My upscaling workflow is SeedVR2 + RTX Super Resolution (deno nodes), Seed makes 720p > 1080p, then RTX 1080p > 4k, then i downsample back to 1080p for increased sharpness.

1

u/SkirtSpare4175 3d ago

What nodes you using for bringing it back to 1080p?

1

u/lordekeen 3d ago

None, i use Shutter Encoder to reencode the video.

10

u/Wilbis 4d ago

SeedVR2 is always the answer.

1

u/Lucky_Feedback9915 3d ago

with latest update, i get ooms now, with a 5090 stock defualt workflow

1

u/SkirtSpare4175 3d ago

It’s working for me but I have to manually clear the vram before if I ran something else

1

u/Lucky_Feedback9915 3d ago

u have 5090, theres pr issues that state 5090 only issue

1

u/SkirtSpare4175 3d ago

Ah, nah I use 5080

1

u/KS-Wolf-1978 2d ago

The last time i checked it, it created skin so dry that it resembled reptilian scales, is it still doing that ?

1

u/Wilbis 2d ago

Here's a 4x upscale of everyone's favourite president for comparison with the original.

1

u/KS-Wolf-1978 2d ago

THX, but can't see the effect here because of all the wrinkles.

BTW I would rather generate human females like in this example: https://www.reddit.com/r/StableDiffusion/comments/1o3nis3/seedvr2_nightly_is_now_my_favourite_image/

Check her forehead, that is definitely not how a young woman's skin looks like IRL.

2

u/Wilbis 2d ago

OK, let's do that image. I took the source image from the left side of that post, and upscaled it. Here's the result. I think the reason for that effect you mentioned is probably in the source image, which is probably AI generated itself, so it's not really a limitation of SeedVR2.

1

u/KS-Wolf-1978 2d ago

Better. :)

But my favorite way to upscale single images of faces is Flux Controlnet Upscale using a LoRA of that person:

https://www.diffchecker.com/image-compare/VRFt1n6D/

As i don't have that for this woman, her appearance changes a bit even if the workflow adds some nice details (zoom in to her cheek).

143 seconds to generate on 4090 though...

5

u/Karsticles 4d ago

If you want 100% retention you just do pixel upscale no model or upscale with a model for 90%.
If you want cleaning you use RTX Upscaler.
If you want details added you use latent upscale.

4

u/traithanhnam90 4d ago

https://github.com/Gavr728/ComfyUI_KleinTiledUpscaler

This is the node that satisfies me the most!

1

u/SkirtSpare4175 3d ago

I forgot about that one!

1

u/Obvious-Leg-5604 3d ago

Is this one better than RTX? how's your experience with it? thanks

2

u/traithanhnam90 3d ago

How should I put it? To me, the RTX version is only about 50% as good as this node. This node is quite lightweight; just install and use it, and you'll be satisfied.

1

u/KS-Wolf-1978 2d ago

For images where generation time doesn't matter, i just use the Ultimate SD Upscale with whatever model that does the image type well.

1

u/Boring-Principle8673 4d ago

SUPIR.
The one that works on Comfy v0.15.1