Location: Darnassus, approximately 54.02, 22.73
Defect: Entire 3D scene becomes white at a specific camera zoom distance.
Reproduction: Move the camera outwards through the affected distance, then reverse direction.
Observed behaviour: White screen appears at the same intermediate zoom position in both directions; UI remains visible.
Frequency: Reproduced on two separate visits to approximately the same location.
You can see through the ground in Orgrimmar just inside the door to the AH as well, and there are lots of mage towers that disappears. (The ones with winding stairs..) You still see some of the background but it is all at a specific camera angle/zoom. This issue exists in all the Classic versions of the game and have for years.
Unsure if it’s the same kind of issue you’re experiencing, just thought I’d share it.