ComfyUI Tutorial Series: Ep12 - How to Upscale Your AI Images

In Episode 12 of the ComfyUI tutorial series, you'll learn how to upscale AI-generated images without losing quality. Using ComfyUI, you can increase the size of your images while enhancing their sharpness and detail.

We'll cover the process of installing the necessary nodes, choosing models like Siax and Anime Sharp for different image styles, and creating workflows that deliver quick, high-quality results. You’ll see how to compare upscaled images and fine-tune settings for the best output, whether you're working with portraits, landscapes, or illustrations.

This tutorial is perfect for anyone looking to improve their AI-generated art with sharper, larger images. Whether you’re using SDXL, Flux, or any other models, you’ll learn how to upscale efficiently.

Download all the workflows from Discord
look for the channel pixaroma-workflows

Go to manger, model manager
sort by type Upscale
Install 4x_NMKD-Siax_200k
4x-AnimeSharp
Refresh ComfyUI

Install this custom nodes if you don't have it
ControlAltAI Nodes
ComfyUI-PixelResolutionCalculator
ComfyUI Easy Use
rgthree's ComfyUI Nodes
Restart ComfyUI

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[SebAnt]

A small token of my appreciation. Thank you for taking so much time to thoroughly test, select the best, and so clearly explain comfyUI to us. The workflows on your discord work like a charm 🙏🏽

[ESheridan]

Amazing! Thank you so much for your special explanation!🤩🤩🤩

[jorgeluismontoyasolis]

Thank you so much. Your work is amazing and highly appreciated. I usually find tutorials about this topic that doesn't show the details behind the process or the role of each node.

[lucifer]

these upscalers are absolutely amazing, thank you

[SumoBundle]

Very detailed tutorial. Congrats and thank you for the effort

[philippeheritier]

wow finally a good upscaler, thank you very much.

[WanderlustWithT]

Bro your tutorials and workflows are super useful, thank you!

[jennifertsang]

Very detailed video & great information!

[jonrich]

Next video please make a tutorial on how to use Flux Controlnet and how to make good images with it. 👍

[MannyGonzalez]

I am very surprised this works so well. I have done pixel space upscaling using [euler/beta] with horrible results and even with very low denoise (.20-.35) the composition changes too much.

Using dpmpp_2m/karras seems to be the trick.

Thank you.

[patrickfougere]

Great video! (Question:1.8) Where is the setting so you can see the CPU, GPU ect... On the menu

[gameboypaul]

Thank you... When you add the kSampler at @14:33, is the upscaling now using Flux? And not just the Siax?

[DreamAnimate]

awesome! is there any way to reduce the grain applied after upscaling?

[Babubabu-fdy]

please make a compy ui video on using and installing mimic motion, i really appreciate your video, it is very clear compared to other YouTubers, can mimic motion be used on comfy ui on swarm ui?

[hyejinahn]

I have a Lora that I trainted with Flux dev for my beauty product. Can I incorporate the lora node into the t2i upscale workflow and change the diffusion model to flux dev?

[robrever]

Cool video! I'll definitely try out your approach. However, in AI Search's comfyUI tutorial, he says using tile upscaling yields far better results. Have you tried his method to compare?

[AlexanderGarzon]

Personally I prefer to let the model-upscaler step for the last step, and have the latent img2img upscale as the second, that way you can make a good use of your VRAM, speed up the process and the result ends up the same. so, TLDR: from your workflow, I will swap the generations 2 <-> 3

[КристинаБуняева-ов]

Hi (:
Can you please tell me what is the other use of Upscale besides photoshop? Here I am doing 1280 by 720 resolution for visual novels. Even if I will use in the game is not this screen resolution and FULL HD, but still the difference is almost equal to zero. Thanks 🙂

[AnNguyen-pdxi]

2:40 . Hello. Can you explain how to get the result image to be exactly the same as the original image? Whenever I use this workflow, the result is always different from the original.

[rufu]

I'm getting Bad Request errors when trying to install upscalers. What might I be doing wrong?