Immediately Fast causes maps rendering in the GUI to not appear properly likely due to IF's map atlas optimization. This can be reproduced by having a map in a cartography table.

Without IF:

With IF:

Relates to #388.

This has been fixed in the latest dev builds:
1.21.6: https://github.com/RaphiMC/ImmediatelyFast/actions/runs/16391329548
1.21.7: https://github.com/RaphiMC/ImmediatelyFast/actions/runs/16391326372
1.21.8: https://github.com/RaphiMC/ImmediatelyFast/actions/runs/16391321717

Sounds good Raphi! Confirmed using the snapshot, root cause is MapMipMapMod

@Crec0 I could not reproduce this on 1.21.8 with your mod:

https://upload.raphimc.net/u/i883W3.png
https://upload.raphimc.net/u/zI7xhr.png
https://upload.raphimc.net/u/WJcSg9.png
https://upload.raphimc.net/u/zjzRyd.png

@rubbean Upload the game log

Hi, I was able to replicate the issue in 1.21.7, having these images show up in the hotbar instead of the actual maparts we made. This was done on a public 1.21.7 paper server that has been updated through the years from 1.16.5 to 1.21.7

Hey @RaphiMC, when there's multiple maps in the atlas, the dev builds don't actually fix the issue.

Here's some example images:
https://zipline.crec.dev/u/ad4bddc2-d292-47a9-92d1-34aff310e4da.png
https://zipline.crec.dev/u/000baaa3-4249-42bf-a98b-83144a44c027.png

Notice the hotbar render (using my map-in-slot mod) vs the render in the world is entirely different.

Same exact issue can be observed when you put the map in a cartography table.

@Crec0 I could not reproduce this on 1.21.8 with your mod:

https://upload.raphimc.net/u/i883W3.png
https://upload.raphimc.net/u/zI7xhr.png
https://upload.raphimc.net/u/WJcSg9.png
https://upload.raphimc.net/u/zjzRyd.png

Interesting. I used the 1.21.7 github actions build shared above. I will try out 1.21.8 and see if it differs.
Unless you are using a different commit build

Hi, sorry for the late reply, there isnt much interesting in my game logs, but here's a link to the logs, below i've attached what the maparts supposed to look like aswell. https://mclo.gs/D4DFCoU

@rubbean You aren't using the above linked dev builds. The issue is not yet fixed in the latest release version. You need to use the dev builds linked above

using the dev build it seems to cache the wrong maparts, heres the logs: https://mclo.gs/IX4Wi26

all the maparts in my inventory were letters, so none of them are actually showing up properly.

I tested it again on a vanilla server with multiple maps and there were no issues in regards to showing the wrong map. Make sure to try it without any other mods, as they might be interfering/conflicting in some way (This would be its own issue then). If it still happens, I need detailed steps how I can reproduce the issue myself.