I'm in 1.17.1 with 1.4.2 of imageonmap and the image is showing whatever the splatter map is, but when I put it in item frames it doesn't show up.

@Spottierfriend you should try the 4.2.0 that's on prerelease status. https://github.com/zDevelopers/ImageOnMap/releases/tag/v4.2.0

hi im having the same problem in 1.17.1 im on 4.1.2 for the image on map verson i recently got my server to 1.17 and never had a problem in 1.16 but now its having problems should also do 4.2.0?

Fixed in 4.2.0 and 4.2.1 for 1.18
https://github.com/zDevelopers/ImageOnMap/releases/tag/v4.2.1