Resource pack

Pictures, GIFs, skins, items and your fonts come from NxHolograms' resource pack. Text in the default font works without it. One pack works on every Minecraft version from 1.21.4 on.

Where it is

Every /nxh applyedit saves it to plugins/NxHolograms/output/resourcepack.zip. The editor's Build & Deploy page has a download too.

Giving it to players

NxHolograms does not send the pack on join. Use your server's own pack setup:

With server.properties: upload the zip where players can download it, set resource-pack to its link and resource-pack-sha1 to its SHA-1. Add require-resource-pack=true to make it required.
With a pack plugin: add the zip like any other pack.

After every deploy that changes pictures, fonts or skins, give players the new zip.

Other packs and shader packsNxHolograms draws pictures in their true colours. A pack that also changes Minecraft's item shader, or a shader pack like Iris, can make them a little darker. Everything still shows.