Operating System: Windows 10 1709 16299.492
Graphics Suite: 2xGeForce 1080Ti SLI, 3840x2160x10 @ 60Hz, RGB, Full Dynamic Range, otherwise default settings
Graphics Driver: NVidia GeForce 398.36
ESO Client: 220.127.116.113296
Date/Time (EST): 2018/07/04 04:45, NA server
Experiencing a weird graphics anomaly. Noticed it first inside of Malabal Tor / Chancel of Divine Entreaty (delve-ish space containing the Alessia's Bulwark set crafting complex). The screen shot is from the interior of Craglorn / Belkarth / Crossroads Tavern, near the cooking fire (specifically the masonry oven construct near the door of the interior room where the chef is stationed). This phenomenon is persistent and reproducible, does not go away once textures have loaded/whatever, cannot be eliminated by exiting the affected locality and re-entering, or by logging out and back in again.
So far, this occurs randomly without warning, with and without addons enabled (the screenshot is with addons enabled; disabling all addons has no effect), with and without other applications running, only within interior spaces, and tends to occur only when orienting the camera in certain directions, though in the Chancel of Divine Entreaty, it occurred almost virtually always: I had to turn the camera around backwards, fiddle with it to find the right orientation that eliminated the defect, and then had to walk "backwards" to navigate to the specific crafting station I wanted and again to get out of the crafting complex. Reloading the UI and logging in and out doesn't seem to affect the problem.
Update: A few hours later, after I logged out of the game, I switched my monitor cable from one port on my "upper" (in PCI bus order) 1080Ti to another, logged back into the game, and could not reproduce the problem in Belkarth / Crossroads Tavern (same location from which the screenshot was made). Will play with this some more in the next couple of days, and see if it happens again. For those experiencing this problem, logging out may indeed clear the problem, and/or it may be an artifact of very specific little details of your graphics configuration.
Update: Still happening. See second screenshot. Went back to Chancel of Divine Entreaty as a test. Not as severe, select camera angles only, but definitely still a problem.
An odd variation, 14:12 EST on 2018/07/05, just NW of Greenshade / Verrant Morass Wayshrine (see minimap in the screenshot). This is entirely outside. The ground and its surface textures remain visible in this screenshot, but all the "furniture" (rocks, vegetation, etc) are gone. In all my other experiences, the whole world disappears, only PC/NPC models and the horizon topography remain. There is a smallish rock (about as tall as my character) in line with the camera immediately adjacent to the character (effectively just off the PCs right shoulder), and large rock/cliffside just behind that, both close enough that the camera should not remain at max distance (as is the case in the screenshot), but should have pushed closer to the character to avoid "clipping". Obviously, these intervening rocks/cliffside features have vanished from the world along with everything else.
Next odd variation: In Hew's Bane / Abah's Watch, outdoors, down by the harbor, no "furniture" nearby, no particular camera angle affected the problem. This also happened again up on the platforms above the harbor adjacent to the city buildings AND down next to the water, on the east edge of the harbor area (referencing the minimap in the screenshot: this second manifestation occurred just west of the "quest transport" icon that is superimposed over the the water travel/taxis at the northern tip of the harbor; camera angle did make the problem come and go here, somewhat). These were severe enough manifestations that I could not navigate to the stairways up from the water back into the city: the stairways and everything else disappeared. I had to transport to one of my residences and wayshrine from there to continue where I was going.
A more normal variation, Glenumbra / Enduum delve, near the front (see minimap in screen shot). Had to navigate by minimap, all the walls were gone.