What happened?

I have tied my animals to different fences, but the leads were rendered as connected.

I tried it with different shaders and it happened every time.

After removing Iris the problem didn't repeat.

Screenshots

with Iris

without Iris

Relevant log output

No response

Iris and Minecraft Version

iris-mc 1.17-1.1.1 for minecraft 1.17 and 1.17.1

Are you running Sodium along with Iris?

No

Operating System

Windows 10

What is your GPU?

Nvidia Geforce GTX 1070

Java Version

Java version 8 update 301

Additional context

No response

We need an f3 screenshot for both, as well as logs

This seems like it might be an issue with the line strip draw mode in the Iris batched entity rendering code. I'd have to verify for sure but this would cause different line strips to connect together like what is being observed here.

Logs and F3 screenshot probably aren't needed for this particular issue since I already think I know what's going on.

This appears to be related to a vanilla bug, but it seems like Iris intensifies it: https://bugs.mojang.com/browse/MC-212629

While in vanilla it only happens with leads connected to invisible entities, it happens with all leads in Iris. Fixing this issue in Iris will also fix the related vanilla bug.

Very cool. Good job :)

This should be fixed as of df9a932, this fix will be included in Iris 1.1.2 which will come out soon.