Can only blur once per frame

Game crashes whenever I load any shader pack, so I'm pretty sure it is an iris error.

java.lang.IllegalStateException: Can only blur once per frame

java.lang.IllegalStateException: Can only blur once per frame

latest.log

crash-2025-10-15_15....

16 Replies

snowman 4OP•2mo ago

~~OK its one of my mods crashing it. time to find out which one...~~ nevermind its only some shaders that work. ones that dont work so far are shrimple, rethinking voxels and BSL. complementary works. @Samalando (ping on please) saw you also use macos, you seem like the person to tag in this instance maybe? ive also tried updating java and trying different versions of iris. im unsure what makes complementary different from the other shaders ive tried that means it doesnt crash

Samalando (ping on please)•2mo ago

I know some shaders don’t work on MacOS, but this is a weird bug Does it happen with just iris and sodium?

snowman 4OP•2mo ago

havent tried any other shader loaders, dont want to mess around with optifine im not even getting to the "this shader doesnt work on mac" error, and even shaders that ive used previously dont work anymore.

Samalando (ping on please)•2mo ago

I would try with just iris and sodium, but I feel like immersive ui is causing issues

snowman 4OP•2mo ago

oh right thats what you meant yeah i tried it with just iris and sodium and no other mods or resource packs and still got the same error

Samalando (ping on please)•2mo ago

:thnk:

snowman 4OP•2mo ago

heres the latest.log and crash log for just iris and sodium

latest.log

crash-2025-10-15_19....

snowman 4OP•2mo ago

thinking of trying it with the normal minecraft launcher in case its prism launcher causing it for some reason? maybe??

Samalando (ping on please)•2mo ago

I use prism launcher on the daily So However it wouldn’t hurt

snowman 4OP•2mo ago

whats your setup? im on an M2 macbook pro. nope normal minecraft launcher crashes too

The game crashed: rendering screen
Error: java.lang.IllegalStateException: Can only blur once per frame

The game crashed: rendering screen
Error: java.lang.IllegalStateException: Can only blur once per frame

Samalando (ping on please)•2mo ago

M1 MacBook Pro

snowman 4OP•2mo ago

trying a fresh file on prism launcher now nope even a fresh one died instantly

Samalando (ping on please)•2mo ago

Hmm @IMS do you have any idea?

snowman 4OP•2mo ago

someone else in the shader labs discord is having the same issue as me. they havent fixed it but they did notice this in the crash log

-- Screen render details --
Details:
    Screen name: net.irisshaders.iris.gui.FeatureMissingErrorScreen
    Mouse location: Scaled: (403.996094, 295.885041). Absolute: (807.992188, 591.144531)
    Screen size: ~~ERROR~~ IllegalFormatConversionException: f != java.lang.Integer

-- Screen render details --
Details:
    Screen name: net.irisshaders.iris.gui.FeatureMissingErrorScreen
    Mouse location: Scaled: (403.996094, 295.885041). Absolute: (807.992188, 591.144531)
    Screen size: ~~ERROR~~ IllegalFormatConversionException: f != java.lang.Integer

so its possibly something with the screen size (and possibly being on a retina display?)

IMS•2mo ago

pretty sure I know why this happens This is happening when you turn on a feature of a pack that is specifically marked as macOS incompatible It’s supposed to be popping up a “missing feature” screen, but that screen is… broken because I never tested it in a long time Features that I know cause this: - Shrimple/Rethinking Voxels (like, at all) - BSL/Complementary colored lighting

snowman 4OP•2mo ago

Ah I'm sure I've used BSL in the past, I can't even load it in the first place

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Can only blur once per frame

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