Describe the bug
While TAA is enabled inside any shaderpack your chess pieces moose form.

To Reproduce
Steps to reproduce the behavior:

1. Go to Video Settings, Shaders, Enable any ShaderPack with TAA Antialiasing.
2. If you swap to FXAA, the issue does not persist.

Expected behavior
Ideally all graphics work with both FXAA and TAA,

Screenshots
I believe you have seen this issue, i don't know if you ever found out that it's an Anti-Aliasing issue.

Versions
I believe it is any version.

Additional context
I'm unsure if it's a model or other graphic based issue. I'm going to continue some more testing as i can.

Doesn’t iris always load in with the shader pack not immediately turned on?
Iirc, the 1.18 one works with optifine, so long as a restart happens, but I’m not sure

Is this 1.16? 1.19?
If 1.16, did you try restarting the game after loading shaders
If 1.19, it’d require sizable rewriting of the renderer to fix it

Two things I guess I left out.
Fabric Iris and 1.18.2 for the Minecraft version.

I was making a personal mod pack and debugging things as I go so many restarts has happened.

Sorry if the images makes scanning through here annoying. Just thought I'd share some images of the situation.
Doesn't seem very good with shaders in general. I'm still gonna love playing chess in Minecraft but Shaders is just nice to have.

Shaders Used: ComplementaryShaders_v4.5
Hud display showing pieces don't correctly and wild geometry shapes.

Pieces are invisible in world.

Maybe a little miscommunication.
Are you suggesting to use to disable shaders on launch then turn on or somthing else entirely?
There is a check box for disable shaders on launch in iris.

Also can't believe I missed the warning for shaders in the first place in the mod description till now lol. whoopsies!

Well I guess I was using oculus, not iris
But last time I tried this mod with oculus, there was an issue caused by the fact that oculus doesn’t start the game with the shaders enabled