So there seems to be an issue for either 4k resolution or the GTX 780 TI GPU in general. This has been confirmed by the users of steam on the steam discussion part of Fallout 4. Included is links to the thread(s) along with screen shots (One will be attached)

Links to discussions:
http://steamcommunity.com/app/377160/discussions/0/496880503081098265/?tscn=1447141129#p1

http://steamcommunity.com/app/377160/discussions/0/496880503081003608/

Additional screenshot:
http://i.imgur.com/uv44Xct.jpg

http://imgur.com/P6dI7JP

System specs:

CPU: FX-6300 (six cores)
GPU: GTX 780 TI SLI (x2)
RAM: 8GB 1600 MHz
Monitors: Samsung 590D (3840x2160), BenQ V2420H (1920x1080)

I have the same issue. For me it is due to "unsupported" resolution.

All of the 16:9 and 16:10 resolutions provided work, but I have 3440x1440 resolution display. If I set the resolution from the .ini file manually, the resolution is correct, but the problem is exactly the same as OP.

I have GTX 670 with GeForce 358.91 driver and Windows 10.

Image: dropbox com/s/08ufiu5rj1g22k4/2015-11-10_00001.jpg?dl=0 (please replace the space with dot, I do not have yet premission to post links.)

It would be ridiculous to play with the largest 16:9 resolution (2460x1440), because that would show 1000 pixels of desktop, or be stretched 50% too wide.

Hopefully there is an quick and easy fix coming today to make sure gaming experience is as its best for players with higher resolution displays, and specially ultra wide resolutions.

Same issue here. Using an LG 34UM95 display, with the .ini tweak applied to obtain a 21:9 3440x1440 resolution, and a Geforce GTX780 TI. I can totally ignore any number of other Gamebryo glitches, but this one is unbelievably annoying. On the same level of annoying as the game not having native support for UWS hardware... I mean, come on! Was there really no discussion regarding users who would certainly want to run the game at QHD/UHD resolutions? The tech has been around for a while, Bethesda, I think it may have been more prudent to spend the little bit of extra dev time to support it. And the game has been cooking since 2010? I find this massively hard to believe... At any rate, is this something we could please put on the short list of priorities for a hopefully near-future patch? I find it difficult to want to keep the game, thinking I have to put up with this immersiveness-breaking issue the whole way through...

I was thinking about the reason for this bug, and I would guess that since after setting manual resolution, the launcher options has empty dropdown for resolutions, it could be so that the function to calculate light related effects takes the required pixel size from this dropdown. And since it is empty, default, 800x600 is selected. The game for other graphical features would then instead use the resolution provided in the .ini. This would explain why only a strip of the top is correctly rendered, and it also shows that it is not a full line, where the rendering style changes. Indicating required pixel amounts per frame to be calculated for the effects to be lesser than the full resolution.

It is interesting though, that this does not happen all the time. Only when specific bright light sources are right in the view.

For example, before image, where graphics are correct: dropbox com/s/ru87t83ywhw5ey8/before.jpg?dl=0

And after image, where I have taken single step towards the light source: dropbox com/s/u9uwg9nyv51ab24/after.jpg?dl=0

Yes, the evidence does indeed point towards this being a particular light-related shader pass, as the dark box disappears when the camera is moved downwards or upwards a certain amount. Unfortunately, it doesn't seem to be any of the shaders we can shut off on the advanced display options; I experimented with switching off everything allowable through the gui, to no avail. Of course, there's a ton more knobs and dials to turn in the configs, but I don't have the time, nor the intention, to go through it all... I don't remember getting a beta invite from Bethesda for this game, and I already have $75 invested in the product... Not burning my own time trying to tweak in hardware support that definitely should have been there from jump! This is all not to mention the other graphical side-effects of increasing the game resolution via the .ini... Stretching, background boxes not appearing behind text with the correct alignment, etc. Bethesda needs to look at this, and not rely on the paying consumers to fix this part of the game for them.

If your running Fallout 4 with SLI enabled, Disable it. Even without a SLI profile it seems to causes issue with rendering. Im in the same boat. Running 2x GTX980Ti @ 4K. If i use SLI i get 30-40fps and lighting pixelation on most surfaces as well as puddle reflections are messed up. Disabling SLI (Not setting single GPU in the global profile) solves the problem, aswell as running the game at an average 60fps.

Good advice; sadly, I am not running SLI. I am a single 780ti, on the latest NVidia drivers. Come to think of it, though, I am not ready to let NVidia completely out of the box on this issue... All these last-second driver releases they churn out as of late makes me absolutely believe that they could very well have a hand in the graphical glitch being described in this thread; however, Bethesda is still squarely on the hook for being completely lazy/cheap on the QHD/4K support level.

Maybe we ought to go looking for Bob Altman's Twitter handle...

Having the same problem with the weird shade as OP except I have Titan black sli. And the shade is a lot higher up. I also am playing at 3440x1440 (sorted through ini files) and im not sure what to do now.

I'll sign my name to this one. 3/4th of my screen has the dark bar, leaving me to try to play the game in a window on my desktop. It kills the immersion however and leaves me disappointed.

I have tried all the .ini tricks, updated my drivers and still have the issue on my 670.

I would be so bold and say it is not a driver issue. 3k resolution works just fine with same settings. 4k doesn't.

Just to add my 2c here so hopefully we get a fix.
I'm getting the same issue.

780Ti Overclocked.
i7-4930k Overclocked

Philips BDM4065 40" 4k RES (3840x2160)
Latest Nvidia driver as I read somewhere that would help, no change.
Tried changing a few lighting related settings and also ambient occlusion, no change.

Any tips/updates soon Bethesda please?

Hello Vault Dwellers,

Before we start here are my specs:

CPU: i7 5960x 3.0ghz 8 core
GPU: Titan Black 6gb
MoBo: ASUS Rampage V Extreme
RAM: 16gb Corsair GDDR5
RAID Zero: 2x125gb SSD = 250gb
two x 2tb Seagate Hybrid Drives
Monitor: Samsung 40inch Smart TV 4k 3840x2160
OS: Windows 7 Professional 64bit

Okay when I play the game at native resolution on high settings I periodicaly get a grey filter-like shading on the bottom half of the screen. Like the area is in shadow, a uniform grey shadow.

I realise the Titan Black is an older NVIDIA card but it is still very powerful. Should this be happening?

I have tried all the fixes and updated all my drivers, Is Fallout Four 4k capable?

Just in case someone having this issue hasn't seen it yet... Apparently a fix for the 'shaded box' that occurs at > 1080p resolutions has been found, according to this Steam community thread:

http://steamcommunity.com/sharedfiles/filedetails/?id=551069501&tscn=1447077828

I will not be able to test this myself until this evening, so if someone else gives this a shot and it works, could you respond in this thread and give us the good news? Else, I will update with my findings, later.

Same problem here, using a 4K display @ 60Hz and the launcher suggests high graphics settings, but I'm getting this issue along with constant microstuttering, ever second the game chops. Pretty annoying.

Specs:

GTX 770 4GB

8GB DDR3

Intel Q9450 (bit old but works well for all other modern games)

Philips BDM4065

3840x2160 resolution

Getting the same half screen in dark as OP. Have tried every graphical combination, from everything to low, to everything to high. Game stutters from start to finish including splash screen and menus, to playing the game. No crashes, though.

Tried this, didn't work:

If you are finding your image has this odd dark rectangle bug in your Fallout4Pref.ini file change:
bComputeShaderDeferredTiledLighting=1
to
bComputeShaderDeferredTiledLighting=0

Damn... back to the hunt for a fix then

Thanks for the update, http://www.gamesas.com/user/971070-tungst3n74/.

Spoke too soon! It worked. My issue was that the setting needed to be changed in the ini file on the C drive, where the My Games folder contains the INI files for FO4. My steam library is off of my OS hard drive for FO4 due to the size (25GB). When I changed the above-mentioned setting in the Fallout4Prefs.ini file in C:\Users\user\Documents\My Games\Fallout4 it worked. No more half dark screen.

The constant stuttering is still there, but I believe I can attribute that to the fact that it's not on an SSD. I'll be changing my OS drive from a 128GB to a 512GB today or tomorrow, and can report back.

Can anyone tell us what " ComputedShaderDeferredTiledLighting " actually is and what is affected by turning it off?

For example will we lose effects like "godrays" etc?

Looks like a graphics language option, not sure if it'll affect godrays.

http://stackoverflow.com/questions/22106047/tiled-rendering-compute-shader-light-culling-and-shading

Well, that's good news! I'm about to sit down and give it a try myself. I'll pop back in with my results. We may have a winner... At least on this particular issue!

Bingo! Worked for me too, and I can now finally play in UWS resolution. Game is gorgeous at QHD+, it boggles my mind why Beth wouldn't have wanted people to be able to experience it this way without all the hassle.

tUngst3n74, I haven't had any stuttering/hitching issues, but I am running from my OS SSD though. You may have it right in suspecting the platter drive... Definitely sounds like there is a resource struggle going on somewhere, if it is happening with that kind of regularity. Hope the drive changeout resolves it for you!

Thanks for the support, I should be receiving the new drive tomorrow. To be seen! I've tried several different setups and configs to no avail. I've seen people with far superior specs than mine having exactly the same issue, stuttering every second. Really ruins the game.

Thank sweet baby jesus,
This works, the graphics look lessened somehow to me, but the games playable.

I used the 'fix" and it is working for me plus I have the game installed on my Hybrid drive and i see no stuttering

Agreed on the point that something 'feels' a bit lessened with this setting, but I was too busy collecting every bit of junk in the Boston Wasteland and dumping it into my workbench last night to put my finger on exactly what the effect was, outside of getting rid of the dark artifact! As I spend some more time with it, I'll try and look for specific differences in the shader outputs, but without the official support for QHD built-in, it will be a complete pain in the behind going back and forth between settings to compare... More so, I'm sure, the farther I get pulled into the game world

Changed to an SSD, but the every-second stuttering is still there. Starting to question my CPU.