Weird vertical lines when going into dark caves while using bliss.

i... have no idea what that is.

why didnt you follow the issue format for bug reporting? now i have to ask for all the relevant information again :(

Describe the bug

Describe the bug in as much detail as possible. capturing footage of it with images or videos is preferred.

Describe how your minecraft is set up

1. Include a screenshot of the in-game f3 debug overlay. Please make sure it is fully visible.

2. If you cannot do option 1. Please list the following information instead:

• What GPU vendor you are using (e.g Apple/AMD/Nvidia/Intel)
• What operating system you are using (e.g Windows/Linux/macOS)
• What minecraft version you are playing (e.g 1.20.4, 1.16.5, 1.12)
• If you are using a special client for minecraft (e.g lunar, badlion, feather)
• What shader loading mod you are using (e.g Iris/oculus/optifine)
• What version of the shader you are using (e.g Bliss v2.0.4, Bliss Shader Main)
• If you are using any, what additional mods you are using besides the ones required to use the shader (e.g distant horizons, physics mod)

Describe how to reproduce the bug

Show exactly how to make the bug appear, if you can. Video footage is preferred.

Isolate the bug. some multiplayer servers cause issues on their own. in a newly made singleplayer world, with default/reset shader settings, show the steps to cause the bug

if it is happening on content from a mod, list what mod, and what content of that mod it happens on.

if a specific shader setting can make it start/stop bugging, please list what shader setting does that.

This looks like cave light leakage but on a level I never seen. I would try to increase the shadow distance and toggle the OLD_CAVE_LIGHT_FIX flag on the shader config to see if it solves the issue. But without more information it is impossible to help you.