I'm having the same problem as listed here:
Additional Rare errors:
- However, I also noticed that there's also a rare square of the world's land showing up as black occassionally (perhaps from trying to calculate a cloud's effect on it and failing?).
- Also, I noticed rarely there would be a white bar running through the title's of things like shops and mailboxes.
I followed all the steps listed by @Jose_V_Intel, updating the driver (after reverting to the Microsoft driver), and reinstalling the game without any addons.
The problem persists.
Note: I used the latest driver instead of what was posted at the time (igfx_win_100.9684).
Then, I found this Reddit post: https://www.reddit.com/r/wow/comments/kzzzl5/has_anyone_ever_seen_this_before_trying_to_figure/
Switching from DirectX 12 to DirectX 11 worked for me.
I did not test the other Reddit suggestions.
Thank you for posting on the Intel® communities.
I do appreciate the information provided and also the steps that helped you fix the issue. This information will help anyone that is facing the same issue as you.
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Intel Customer Support Technician