Godot Version
4.6.3 stable
Question
Hi guys,
I wonder why my viewport starts flickering with black lines on run. It stops when the viewport loses focus and comes back when focused. Didn’t happen in 4.5 stable.

Is this happening in a new project as well?
To help troubleshoot, could you share:
Version: What engine version are you demonstrating here?
OS: What operating system are you using?
Hardware: What are your specs (specifically your GPU)?
If you are using a Radeon card, it could potentially be a driver issue.
Thx man. Yes, it’s happening to a brand new project created in 4.6.3 stable.
OS: Windows 11
GPU: 5070ti (driver version: 32.0.15.9186. I updated it 2 or 3 weeks ago.)
I thought about the driver issue, but I’ve read it on reddit saying the latest version has some issues, so I am pretty torn about updating it right now.
Download Godot 4.7 (beta5) – Godot Engine might be worth a shot.
4.7 yields the same result, but I managed to fix it by switching Monitor Technology to Fixed Refresh. No more flickering. So I was running 4.5.1 on a LCD monitor while 4.6.3 is paired with a OLED monitor. It’s more of a monitor issue I suppose.