Minecraft graphics glitch using shader, no shader = no glitch

[sudden zinc]

Link to 16 second youtube video showing the glitch: https://www.youtube.com/watch?v=9Njl941s8VU Nvidia 4080. Nvidia driver version 570.86.16-0ubuntu0-gpu24.04.1. Mint 22.1, Minecraft 1.21.4. BSL shader version BSL_v8.4.02.2.zip. The glitch happens with X11 and it happens with Wayland. The glitch does not appear when I play the same world, Minecraft version, and BSL version in Win10 (my pc is dual boot). The glitch does not appear if I play the world with no shader. The BSL shader discord guys have been helping me troubleshoot, and suggested I post here. If any of you have an idea I can try, please post. Thanks!

Update to say that I tried Sildurs shader, and it has much worse artifacting than BSL. I think there must be something wrong with the Linux Nvidia driver.

[torn sky]

It's a rendering bug, could u send ur mod list

Or a screenshot of ur mods folder

Also could u be a little clearer

Does this glitch appear on windows aswell or only mint

And is it only in this world?

And could u try some other shader besides bsl and lemme know

[sudden zinc]

Only mod is Optifine.
Glitch does not happen when I play the same world, same resource pack, same Optifine, same BSL in Windows.
Glitch does not appear in Mint if I stop using a shader.
Glitch appears in every world I play in Mint if I enable a shader
Glitch happens with Sildurs.

[torn sky]

Could u activate the shader, and then show me ur optifine shader select screen in both windows and linux

Aswell as ur f3 screen, on the same world with shaders activated

If it's an opengl issue, then we got smthin to work with

[sudden zinc]

I'll get the screenshots soon. In the meantime, I can confirm that I get frequent OpenGL errors with shaders enabled in Linux.

Here are the Linux screenshots. I need to reboot this pc into Windows to get those screenshots.

[torn sky]

@sudden zinc could u pls try iris shaders mod instead of optifine

(or oculus if on forge)

[sudden zinc]

OK.. In the meantime, here are the screenshots from Win10. Same pc and same versions of MC, OF, and BSL.

Looks like this may take a while. I need to get Fabric going (at least I think I do) before installing Iris. I have no mod loaders in my Linux Minecraft installation.

Nothing but the vanilla launcher and Optifine.

[sudden zinc]

OK, the good news is that Iris+BSL does not cause the artifacts and (so far) does not generate OpenGL errors. The bad news is that all of the jazzy customizations in Misa's resource pack (connected textures, emissive textures, random mobs, etc, which rely on Optofine support, don't work. I guess my next step is to find mods that replace all of those Optifine features. Or give up on shaders. :-)

[torn sky]

Use continuity and entity model features for that

It will work

[torn sky]

No opengl errors are an optifine thing, iris won't generate any

[lost summit]

That's an interesting bug

[torn sky]

Yea, it's prolly one missing feature in opengl on linux as compared to windows

[sudden zinc]

FWIW, I'm using a set of mods listed on Misa's Discord that provide some of the features of Optifine, enough to make Misa's resource pack look pretty good. And I can use shaders without graphics artifacts.

[sudden zinc]

This makes me wonder if it's Optifine, Nvidia, or Linux: When I run the same Minecraft version, same Optifine jar, same resource pack version, and the same shader version on Windows 10 (my pc is dual boot), I do not get any artifacts or OpenGL errors. Where is the bug? Optifine, Nvidia driver, or Linux's Open GL?

[torn sky]

Some issue between the driver and the opengl implementation and optifine is just stuck using the broken stuff

But since the opengl version being used is the same