4 hours ago
(08-10-2025, 05:34 PM)Ofnuts Wrote: You don't need a "mask" (or at least not the "mask" concept as understood in Gimp). .There are plenty of tools to shift colors slightly.
* Colors > Color temperature an increase the intended temperature slightly (this is a prime candidate if you have two image that are likely two photos of the same source, but taken with a slightly different white balance)
* Colors > Hue chroma and slightly reduce the hue
* Colors > Hue saturation
The ultimate tool for this is a CLUT, using the GMIC plugin. Using the before and after images it will produce a Color Look-Up Table (CLUT) that maps the colors between the two images. With the same plugin you can re-apply the CLUT to a different image to obtain the same result (in theory, in practice you can only apply it to a similar image, a CLUT created using an image with plenty of reds may not give good results on an image with plenty of blues.
I tried the CLUT filter (Colors/CLUT before - after layers) and so it says that I need to layers to run the filter. So I just simply duplicated the layer which gave me two layers but the filter still wouldn't run. All I'm trying to do is make a color look up table of my preferred image and apply it to my uncropped high res image.