1. Load the attached save file.
2. Make sure "show decoratives" is on.
3. Make sure you are underground.
What happens:
Small colored rectangles appear on the screen briefly at random positions. They continue flashing/blinking when the game is paused, and zooming out let's you see more of them (upto around 15 at once when fully zoomed out). They are also visible when in remote view, but not in map view.
Does it always happen:
I can always see them in this save, underground only. I have not seen them in other saves yet, though I usually play with decoratives off now.
What I expected:
No random flashing rectangles.
Screenshots
Theories:Since it looked like a memory corruption to me, I tried running memory tests, but they haven't found anything so far. I also tried updating my drivers, but this didn't seem to change anything.
Background info:
I use this save for testing mods, the last ones I tested were Subsurface and LinkedBelts, but I think the flashing only appeared after removing the mods from the save.