[2020] Weird spots on Screen

Hmmm, if on Windows 10, could you change your DirectX version within the launcher’s ‘Settings’ menu and see if the same occurs?

Otherwise - check for overheating: https://support.fatshark.se/hc/en-us/articles/360034115694--PC-How-to-Check-If-Your-PC-Components-Are-Overheating