I only crashed once when I noclipped to get past the claw tentacle thing because I suck richards at getting past it and I didn't feel like re-living my experience in both HL1 and HL1:S where I died a hundred times to it, something about vertices and having too many of them
It happened to me around there too, but I wasn't no-clipping. It's just when I passed from one area to another. Everything went black, and then white, and then I took massive damage, and then it went black again, so I paused and loaded an autosave, and it fixed it. Also, I got past the tentacles without cheating like a boss.
goddamnit one problem after another
Fixed the white line problem, now the character's eyes are untextured
i want help this time
That's really strange. It brings to mind a strange glitch from one of the Silent Hill games. I really have no idea how to help you, but I think this should be addressed by someone who does.