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About
This node was something I had in idea for a long while, but I wasn't too sure how to actually implement a proper regional prompter. The most popular method from a workflow that's pretty popular on CivitAI is to use the cgem156 Attention node, unfortunately this node has quite a lot of issues. For one, it would throw out an error for no particular reason when doing hires fix. This was then "replaced" by the A8R8 Attention nodes in a recent version of that workflow... which also just didn't work for my purposes. The Impact node family has regional prompting nodes, but they all require being thrown into a specific sampler that also just didn't work half the time. Finally, there was the MultiAreaConditioning node a part of the Dave_CustomNode family, but this node is now broken with newer ComfyUI versions.
Finally, I found the FluxRegionAttention node family, and it actually seemingly just works. As thus, I decided to move forward with making a regional prompt workflow based around it. I will state this: it is not perfect. It still has some issues sometimes (eg. sometimes regions can get "swapped"), but I've also had issues with the regional prompt extensions with A1111 as well, so I don't think any regional prompting setup is 100% perfect. However, compared to other regional prompt workflows I've tried before, this is much more consistent (at least for me) than all of them.
This workflow is designed by default to create a simple two region setup, with two columns. It is very easily extensible, and you can use the mask output of a load image node to create fully custom masks without needing to use the region bbox or nodes in the mask setup group.
A note
This workflow contains a lot of custom nodes. Before commenting that you have an issue with a node installing...
Did you read the list of all custom node family/families that failed to import when you restarted or installed a node family, and did you read the console log to see why?
Did you update ComfyUI and/or did "update all" in Comfy Manager?
Did you update Python to the latest version?
If all else fails, try to do a clean install of ComfyUI and try again. If it still doesn't work, then it is an issue on your end entirely and you need to diagnose yourself as to what the issue could be. Go to GitHub and open an issue for instance.