Setting images to indexed mode on Gimp 2.10 is completely broken.

[GIMP Devil]

(09-06-2025, 06:14 AM)Ofnuts Wrote: I don't see your attachments.

Other tan this, 2.10 has been around since 2018 and I didn't see many problems reported against its indexed mode.

I'm trying to upload the attachments, I don't know why they didn't show up... let me try uploading them to imgur as well in case it glitches again and doesn't put the image here

https://imgur.com/a/ihNNKxY

that is a link to imgur it shows all the images, but I will try it here too


This is the indexed image edited on Gimp 2.8 on Windows 7, you can see it has a low filesize of 1.1 kb and no problems


This is the same indexed image as one edited on Gimp 2.8 on Win7, but I exported on Linux Mint Cinnamon 22.1 with Gimp 2.10 (didn't change anything at all just exported the texture)


This is the same indexed image as one edited on Gimp 2.8 on Win7, but I exported on Linux Mint Cinnamon 22.1 with Gimp 2.10 and I added a white background and for some reason the colors don't get corrupted? But the file size is still bloated unlike the original it's 5.3kb instead of 1.1kb and that's without transparency!


These are the settings for the above exported textures on Linux Mint Cinnamon 22.1 on Gimp 2.10 (they are all default, I didn't change anything)

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It has to be a problem with either Linux version of Gimp 2.10 or Gimp 2.10 itself! I just installed Gimp 2.8.22 from my backup HDD and I run it through Wine even though it's so horribly laggy and choppy, but when I exported this same image I showed of the original Charizard as an indexed image it had no problem like the Gimp 2.10 Linux native version did!

See this is the image I exported and it still maintains the transparency, but it was still bloated to 1.2kb instead of 1.1kb, but much better than what Gimp 2.10 did.
I really hope I can be guided to fix this problem or install native version of Gimp 2.8.22 for Linux then I can see if that is indexed mode works or maybe the indexed mode is just broken for all versions of native linux gimps on Linux Mint ;-;

This is the charizard I exported in Gimp 2.8.22 windows version installed with Wine on Linux Mint Cinnamon 22.1 it's how I expected the image to be!
   

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I did some more testing and I changed the settings because after reinstalling Windows gimp 2.8.22 I realized there was a lot of strange settings on gimp 2.10 that are enabled by default, and after changing some my image is no longer getting corrupted when I export it! As seen here with these settings the Charizard image did not get corrupted colors when exported

   

   

But unfortunately it seems gimp 2.10 is just inferior when it comes to smaller file size from indexed images? As instead of 1.1kb original image and the exported 2.8.22 gimp run with wine who exported same image to 1.2kb the settings  exported this charizard image to 2.4kb this is more than 2x size compared to gimp 2.8.22!

I think there is no fixing it unless you have an idea to lower the filesize more? Maybe there is a setting I missed as I never used gimp 2.10 till moving to Linux Mint 2 weeks ago

If it's not possible then I really hope somebody can guide me to install gimp 2.8.22 linux native version to see if that one has proper indexed like the windows version because the gimp 2.8.22 run with wine is SUPER laggy, but if I have no choice I guess I will have to use it