Describe the bug
I've already changed the texture of the header and footer via FancyMenu but no change occurs, nor do the features to deactivate the shadow work.

To Reproduce
Steps to reproduce the behavior (e.g.):

1. Go to a menu page, no matter if it has been changed before or not.
2. Activate the header/footer options to deactivate the shadow or change the texture
3. See error

Game Log
https://paste.atlauncher.com/view/cc8cdacc-f4a4-4bc7-9a0e-cbfe3400f927

Screenshots

Basic Informations (please complete the following information):

• OS: Windows 11
• FancyMenu 3.1.2
• Forge/Fabric 0.15.7
• Minecraft 1.20.4

Please start the game with only FancyMenu + dependencies installed. You definitely have mods installed that mess with screens, so it's very possible this is a mod conflict.

Sure!

I've just tested it with the mod and it still doesn't change anything

Where's the back button in the top-left coming from?

It's just a button that I created to import into all the interfaces

The header/footer textures work fine for me in a clean Fabric 1.20.4 instance with FancyMenu 3.1.2.
But by checking that I discovered a different visual bug. For some reason the footer texture of the MP screen is in front of the Vanilla buttons. This is probably a 1.20.4+ bug.

Oh, I didn't even know it was a bug. I've experienced this bug several times, and in order to solve it I had to redo all the buttons (Vanilla) that were bugged to one made in FancyMenu.

Would you like me to send you my files so you can take a look and tell me what would be the alternative to fixing my bug?

Oh, I didn't even know it was a bug. I've experienced this bug several times, and in order to solve it I had to redo all the buttons (Vanilla) that were bugged to one made in FancyMenu.

Several times? I've checked multiple screens and the only screen I found was the MP screen. What screens exactly did you find that have this bug/problem?
And how exactly were you able to encounter it several times when earlier it sounded like you wasn't able to get the header/footer feature to work? o.O

I had found this on another screen, which is paused during the game (ESC). I had to redo some of the buttons to make them still visible because of the image background.

In fact, I'm still not sure how to make this background completely clean in Multiplayer, without shadows/headers/footers.

It is not recommended to make the screens "clear" in pre-1.20.5 anyway. They are not made to have no headers/footers and removing the header/footer texture can cause render glitches and other weird stuff.

Ohh, got it! I didn't know that, but why pre-1.20.5? Does it have to do with the change they made to blur the interfaces?

Just tested it and setting fully transparent textures for header/footer and disabling the shadows seems to do exactly what you want, ignoring the button glitch of course.

Hmmm, so in for me to achieve the effect I want, I must put something in the background, it can't be an empty .png image, can it?

You need a fully opaque background texture. There's nothing behing screen backgrounds, so using a transparent texture there will do very weird stuff. You can try it, but only for science :)

Actually in some cases there should be the dirt texture BEHIND the custom background, but not in all cases.

So yes, you need to set a custom background, which should override the dirt background and then set a fully transparent header/footer texture. Maybe it's enough to change the header/footer and not the background, but you will need to try that. It could vary from screen to screen.

Let me know if that's what it would be like:
I've changed the background texture via resourcepack but the header and footer I've always left with an empty texture and nothing happens yet

I don't really understand what you expect to happen tbh 😅

Oh sorry, I just wanted a solid background in one color. But I can't do it, so I'm going to close this issue so I can only get help via discord.