What happened?

End gateway beam was rendered twice.

Screenshots

Relevant log output

No response

Iris and Minecraft Version

Iris 1.1.1-pre+null, 1.17.1

Are you running Sodium along with Iris?

Yes

Operating System

Windows 10

What is your GPU?

GTX 1050 Ti

Java Version

Java 16

Additional context

This is NOT a second end gateway in the distance.

This appears to be related to the shadow pass? I bet that the beam isn't properly being rendered into the shadow map and is instead being rendered into the main framebuffer.

This is fixed in the dev branch, the fix will be coming in 1.1.2.