Version 4.0
Welcome to version 4 of my workflow, now with an even further improved base output and a different upscaling method for the refiner. I also want to give a shoutout to Bunline v0.5 and its creator yayaman for his great work finetuning PixArt!
Version 3.0
I managed to get a lot better outputs from the base PixArt Model with some changes and therefore you do not need to do as much refining anymore. Sometimes the unrefined output even seems better. I think this is a huge step up from the previous versions and I would love to hear some Feedback from you! I also wanted to thank you for all the downloads and ratings so far ❤️
Version 2.0
Updated the workflow with an optional unsampling and refining step as well as an optional upscaling step. I have also changed some default settings for the samplers.
Version 1.0
The first release of my ComfyUI workflow for PixArt with a SDXL Refiner. Custom nodes can be found with ComfyUI Manager. Read the description of each node on how to use it if you run into issues! I made this for PixArt Sigma, but the Alpha Version should work as well I think.
Follow the install instructions on https://github.com/city96/ComfyUI_ExtraModels carefully to get a proper install of PixArt and T5!
Description
Changed the sampling and scheduling method yet again. Basic PixArt outputs should be way better now and a lot of times do not even need refining.
Removed Canny Edge ControlNet, because as mentioned the base is already better now and you do not need as much refining. Due to this the Unsampler settings changed as well
Added a few Set/Get nodes for a cleaner look
This workflow now uses the https://github.com/Clybius/ComfyUI-Extra-Samplers custom nodes, but only the extra sampler coming with it. I found the best results seem to come from clyb_4m_sde_momentumized. Since I do not know how ComfyUI Manager handles this extension I am mentioning this here
I noticed the negative embedding I am using seems to be gone, you can try other SDXL negative embeddings, they seem to have an impact on the PixArt output