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The Iris ProjectTIP
The Iris Project•7mo ago•
4 replies
UPS B757-200

Iris not loading FastPBR

I was told to report to Iris Developers, here's the error: Shader program linking failed, see log for details
My log is here: https://mclo.gs/NaeiOny
Debug log: https://mclo.gs/iEMi2fW
MC-Version: 1.21.1
NeoForge version: 1-21.1.194
Screenshot_2025-07-27_164103.png
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latest.log5.11MB
mclo.gs
NeoForge 1.21.1 Client Log [#NaeiOny]
21278 lines | 6069 errors
mclo.gs
NeoForge 1.21.1 Client Log [#iEMi2fW]
10921 lines | 2 errors
Solution
Turning off MotionBlur fixed it.
Jump to solution
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