@kisak-valve OK, I thought I should check if anyone had reported the same issue. However, the #8395 issue seemed too different (it was a different issue and involved a different graphics card). I'll take that into account in the future. My apologies.
# Compatibility Report
System Information
I confirm:
steam-3058630.log
Symptoms
All light and reflections look blocky/pixelated. The light disappears when you get close. The lights turn off after 18:20.
Reproduction
https://youtu.be/k4PidhuIB00