Trouble saving as an 8-bit BMP or PNG

I’m trying to make some textures for Quake. Quake requires 8-bit images and thankfully the palette is readily available. Out of the 256 colors in the Quake palette I’m using 19. When I go and save my sprite to a BMP or PNG (required to package into a .wad for Quake) I’m getting an error. The properties of my saved BMP and PNG says it’s a 32 bit image.

I didn’t use too many techniques (overlays, jumble, and 3x3 blurs) in creating this texture nor did I pick any extra colors outside my loaded palette. Any reason why my images are saving as 32-bit?

Note: I did try and switch it to Index mode via Sprite → Color Mode → Index. While this did save it as an 8-bit the image coloring was WAY off. Thanks for any help

Hey! Sorry if you’ve already figured this out but I do have an answer for anyone else who doesn’t since this is the first result on google!

Changing the indexed color is what you’re supposed to do you just have to increase the color palette size in order for it to be 8bit by choosing the little hamburger/3 lines options button and change palette size to anything between 16 and 256. I’m not sure if there is a more elegant solution but it just fills the rest of your palette with black if you aren’t using anymore colors! Hope this helps 2 years later loll.