Ok, some informations I have gathered and tested for hours to help...:
- Deleting the folder : "Saved" in "\Steam\steamapps\common\ARK\ShooterGame" and create a new game solve the issue.
- I was able to get the bug while traveling with a fast flying mount between in and out of the dome rapidly.
- While in the dome itself, meaning not outside but not inside, I can see the dome rendered correctly.
- The dome glitch was here but not for all of my mount, while using a phoenix the glitch was here but not while using a snow owl.
- The glitch alway occured while riding a phoenix from the mod "Royal Phoenix" which is a fast flyer mount with light effect.
- Roll back to a previous save before the glitch occur solve the problem.
I've tried many fix:
- Deleting -sm4 and many other things in my launch option.
- Adjusting my settings, and so on...
Hope this might help you, I know getting some feedback alway help. And as alway, sorry for my bad english.
Awesome! thanks for all of the details!