Blast Pit: Black screen issue.

Bug:

In the level “Blast pit” when I get to the green toxic goo after the ride with the cart, my screen goes black after passing a certain point (climbing down the ladder), and by black I mean pitch black I can’t see a thing, if I turn on the flashlight the screen turns blue. I can see my HUD and when I shoot with something it turns slightly red like when you’re hurt and you can see again in red darkish color but only for a slight time (doesn’t work with crowbar or a grenade). I actually got further by using that but finally ran out of ammo. The screen doesn’t return to normal even if you advance to the next huge toxic pit.
Any idea how to fix this?

Edit: If I pick up something and start hitting it against walls or something the screen goes red too for a short time, it’s like I’m blind and am coordinated by sounds.

Thanks for reporting this issue. Could you please provide the hardware and software details of your PC, they are essential for troubleshooting this problem.

It looks like a problem related to misbehaving post-processing shader on some older GPUs. Could you please try proposed workarounds available here:
https://forums.blackmesasource.com/showthread.php?p=502093#post502093

Report back to that thread if workarounds works for you or not. Thanks.

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