>I want to fuse three monochorme images into one RGB image. I was told
>I should use the function color>components>compose...
>When I load the images separately, the other images never appear as
>options for the "compose" function. When I load the images as layers
>of a single image, none of them appear as an option.
>GIMP help says absolutely nothing about this. It only assumes all of
>them would be available to chose and attribute to a color channel.
>What am I doing wrong?
What version of Gimp? 2.8 has a message bottom of the image window tell you only
possible on an image that has been decomposed. https://i.imgur.com/YEiBuSB.jpg Gimp 2.10 has a big pop-up message.
However, 2.8 or 2.10 you can re-assemble like this: