Bug Strange horizontal line glitch in both editor and build?

Hi there,

I have noticed an odd bug in my game, there are these glitchy horizontal lines that seem to appear randomly, they look very bad! I have tried having a maximised window and a re-sizable window. The game is running the normal render pipeline with post processing.

I will attach a video link.

Many thanks

 

Sorry, I know that they are hard to see in the video, you can just about make them out towards the end of the clip.

Thanks again

 

I don't see it in video. Try enabling vsync and see if that helps

 

Thanks. I tried all three settings and none of them worked?

 

Does it look like screen tearing? (google it)
If so, google how to enable vsync properly in Unity, as that should fix it.
If its not screen tearing make a screenshot with what you mean

 

Thanks - it is not screen tearing.

If you look at this screenshot of a tree closely, you can see black lines, these occur randomly

 

They are very fast glitches on the screen - they are black horizontal lines which look awful - very difficult to get a good screenshot

 

I have circled the glitch

 

Has anyone seen this before?

 

What Unity version?
Any custom shaders?
Any physics based things?

 

Unity 2020
No custom shaders (that I can think of)
No physics things

 

Did you update to the latest 2020 LTS?

 

Seems like these are purely horizontal, and they seem to happen at fixed intervals as you move forward. They also seem to quickly sweep from the back of the scene towards the camera.

Very wild guess: if your trees/grass use mipmaps, these could just be the textures bleeding/wrapping around when transitioning between mipmap levels. That would explain the back to front sweep effect

Start by hiding trees/grass. If these artifacts no longer appear, take a look at your leaves/grass textures: If you're using atlases, make sure to leave some padding in-between textures, and if you're not, make sure the textures wrap mode is set to "clamp" instead of "wrap".

 

Thank you everyone - I am going to try your suggestions now.

 

You could also try using RenderDoc https://renderdoc.org/ or similar tool to analyze how one of the bad frames is drawn.

 

Upgrading to Unity 2022 seems to fix it!

Thanks for all your responses though.