Bug Description

Iris shaderpacks choosing screen rendering nothing after set the option mixin.perf.faster_item_rendering to TRUE

Reproduction Steps

Version Details:
Minecraft 1.21.1
Neoforge 21.1.172
Modernfix 5.23.0
Sodium 0.6.13
Iris 1.8.8
The option mixin.perf.faster_item_rendering is set to true.
The screen(shaderpacks choosing screen) render correctly when not in a world(mainscreen) but render nothing in any world or server.

Log File

latest.log

I am unfortunately not able to reproduce this. I tested with Embeddium+Iris+Monocle in place of Sodium+Iris (see below for explanation). The shader pack screen renders normally regardless of whether I enable faster_item_rendering or not.

If the issue only happens when running with Sodium, it is unlikely it will be fixed, as I am not willing to run Sodium 0.6+ locally for debugging. However, I will accept a PR from another developer with a fix.

If you are also able to reproduce the issue when swapping Sodium for Embeddium+Monocle, then we can look into it further. In that case it would be useful to confirm that the issue happens with ONLY the mods you listed installed. In your screenshot, it appears you have at least one other mod installed to provide the smoother UI font.

That's my fault:( the problem starts with opening the faster_item_rendering, but after I disabled ModernFix and some other suspecious mods the problem still exists. Thank you for responding me!