IMPORTANT

This workflow is not final.

It's a collection of 4 different workflows used in my livestream here: https://youtube.com/live/J2ABt_9Ewrs

to showcase where we're at in relighting people while preserving colors and details.

I'll have a final, simplified version of this ready for Monday, August 10th.

You'll need my custom nodes for frequency separation, found here:  https://github.com/risunobushi/comfyUI_FrequencySeparation_RGB-HSV/tree/main

If you'd like to use this, each group acts independently, and uses different nodes to try to achieve the same result, match color and preserve details. You can disable every group but one at a time in order to test things out independently.

The first group uses a simple color matching option based on 4 different remappings (clipping highlights).

The second group uses a simple color matching option based on another way of remapping images (shifting the remap to the left).

The third group uses a more complex matching option based on batch average.

The fourth group uses a more complex matching option based on a double batch average.

Import your image in the Load Image node at the start of a group, queue prompt, and you'll get an error - you're missing a custom light mask.

You need to paint the light mask in the Preview Bridge by hand using "open in mask editor".

Or you can use the Load Image as mask node to import a custom mask and plug that into the Grow Mask with Blur node instead of the Preview Bridge node in order to automate the process.

Again, this was for demonstration purposes during the live, but people wanted to test it out, so I'm publishing it.

Cheers!

Andrea