Could not initialize class net.irisshaders.iris.pathways.FullScreenQuadRenderer

Crash to desktop when loading into a world with Iris Shaders already turned on. Minecraft 1.21.1 - Neoforge 21.1.180 I tried doing binary search on my mods to find the culprit but so far its a select few mods that crash the game and with every change I do with a mod the frequency of these crashes are inconsistent. List of mods that might cause crashes when ran together: -Just Enough Resoruces -Lootr -Regions Unexplored - Terrablender is fine -Map Atlases - Moonlight lib is fine -Mccaw Furniture -Lithostitched -LootJS with ProbJS together? -SuperMartijn642's Core Lib -Natures Compass That's the end of the list before I realized it got random and stopped doing it altogether; the latest log has the mod list that was enabled prior to crashing. Anytime I tuned off these mods the game wouldn't consistently crash when loading into a world. The latest log is provided
Solution:
Nice so it is ProbeJS! Neat™! Thank you lots, It just seemed so random when I kept turning off and on mods but I guess in hindsight I prob should've noticed it....
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9 Replies
Allium
Allium4mo ago
crash-2025-06-17_16.55.01-client.txt uploaded to mclo.gs
Uploaded by sammy2188
sammy2188
sammy2188OP4mo ago
Here is the CurseForge sharable profile if you want to test it. This pack is a larger version there is a smaller version in the next comment
hardester
hardester4mo ago
Will look into this soon enough. I have a program right now.
sammy2188
sammy2188OP4mo ago
Thanks for the acknowledgement! I've managed to strip the pack the pack back down to the few mods that might cause issues: The options.txt should be set up so that you can simply start a world, with shaders already on, and it should just crash. Just made someone test it on their computer. I also noticed that a mod contains Forgified Fabric API that's listed in the crash report; would that cause any known issues? Just throwing that out there.
hardester
hardester4mo ago
I hope my 6 GB RAM laptop doesn't crash... :yes: My laptop is struggling real hard, but I managed to get it running. ProbeJS is the one triggering the crash for this specific instance. Disabling only ProbeJS allows me to enter a world.
hardester
hardester4mo ago
Glorious 2-3 fps on this ancient laptop.
No description
sammy2188
sammy2188OP4mo ago
Nice so I guess when im done making my modpack i can just disable that and it should be good to release? I should prob try it out before I say anything :P
hardester
hardester4mo ago
Definitely give it a try first.
Solution
sammy2188
sammy21884mo ago
Nice so it is ProbeJS! Neat™! Thank you lots, It just seemed so random when I kept turning off and on mods but I guess in hindsight I prob should've noticed it.

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