consistent color palette from multiple images

[Ofnuts]

A different solution:

1) For each image:

• Convert to color-index if not done (no need to save at that point)
  
• Copy the color map as a palette (in the Palettes list, the color map of the current image is the first one, so you just duplicate and rename it).
  

2) Gather the palettes (if necessary, the palettes list right-click menu has a "Show in file manager" entry)

3) Create a composite palette: add all color lines from all palettes and remove the duplicates (a good text editor must have something to sort lines, so locating duplicates shouldn't be hard).

4) Save that palette to the Gimp palette directory

5) For each image:

• Convert to full RGB
  
• Convert to color-indexed, providing the palette created previously
  
• Save/Export