What happened?

While using BSL shaders, you can see that if you look at the water surface from inside, the reflection is way too strong.
First picture is from Optifine, second from Iris.

Screenshots

Relevant log output

No response

Iris and Minecraft Version

iris-mc1.17.1-1.1.2.jar for Minecraft 1.17.1

Are you running Sodium along with Iris?

Yes

Operating System

Windows 11 Home

What is your GPU?

Nvidia GeForce GTX 1650 Ti

Java Version

Minecraft running on Java 16 + Iris installed with Java 8

Additional context

No response

Duplicate of #961