https://www.posetteforever.com/viewtopic.php?f=68&t=3030&p=37789#p37789
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Nik
Wednesday, 12 December 2007, 10:41 PM

Indexed Images !!!
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Yippeeee !!!

Okay, I'll be re-doing the process several times to become familiar with the path through GIMP menu system, but arcane 'indexed images' facility does *exactly* what I was trying with ImageForge...

GIMP took my piccy, converted it to my choice of numbers of colours, here, shades of gray. It created a custom palette with those colours, then let me edit palette to selected colours, auto-changing same colour in piccy. In this case, I put in a pre-calculated gradient (RGB 248 200 200 --> 248 248 248), but could have been psychedelic highlighting... Or Marbelling ??

Aaaand, I think I could have saved the modified palette for re-use, but I must have blinked.

Er, looks like I'll be spending some time learning my way around GIMP, printing HELP-pages as I go...

Thanks again for the Excellent advice !!

If I can, I'll post the Before & After JPGs for comparison.
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