Hi. I have discovered some sort of bug or problem with the game. My hardware is not up to date, but it runs other high intensity games pretty well such as Evil Within.

In Fallout 4, my computer at first appeared to be horribly gimped. My fps drops to the teens in many areas without tweaks. So I lowered resolution a huge amount and turned off shadows, god rays and many other things I could find. At 1280 by 720 I was able to maintain 30 fps and the game was playable until the inside of corvega factory.

I had put shadows to 8 resolution, and max particles desired to 75. Many other things were disabled using acual ini settings with read only.

With all of these tweaks here is what I saw:

When I looked right from corvega entrance, 60 fps.

When I looked left, 20 fps.

What is different? Four hanging flourescent light fixtures.

I went around the right corner to find a light stand of the same style, like the kinds with wires hooked up to a mini genny like they put in caves. 20 fps dip

Many people say shadows are the problem, but I think they are just a symptom. Something about certain light fixtures is generating a massive bug like number of shadow calculations.

Other light sources don't do it, such as search lights.

Plz fix.

This. SO much this. Bethesda, please get on it. We're not the only ones with this issue... Makes some areas nearly unplayable or frustratingly difficult when they shouldn't be difficult at all.

Yes, I can confirm this aswell. There is a staircase inside the factory where two of these lamps are. Whenever I watched the staircase the fps dropped massiv. I looked away from the staircase and everything was just dandy. Makes me think somehting may be wrong or overdone with light/ray calculations with that specific lightsource.

If you haven't donw so already, could you do the quest, from the Rex Hotel, in Goodneightbor, where the guy wants the drinkin' buddy robot? When I did it and escorted the robot through the city/wasteland to the walled town, of Goodneighbor, every time I looked at the robot, I got a massive frame dip, when I turned away from the robot, I was fine.

Can anyone else confirm this?

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i7 4790k, Asus Strix GTX 970, 32GB RAM, Samsung Pro 512GB SSD, 1440p BenQ BL3200PT 32"

If it's happening when you look at a surface reflecting their light and not just when the actual source is near the edge of the screen, then yeah I guess it is a ray calculation problem.

Hmm. Does the robot have a light source on it, like coming from the eyes or something, that would be similar to hanging flourescent lights in any way? It could be a bug with a collection of light sources.

Or it could be certain surfaces that generate the bug when light is bounced off of them.

Please report it in this thread so it can be logged:

http://www.gamesas.com/topic/1544248-bug-report-index-pc/