[NEEDS INPUT] Counter and backsplash unnaturally darkened on a diagonal

There's no fix, but you can workaround the issue by positioning counters a little distance away from the wall, enough that backsplashes aren't generated.  There is still a bit of darkening on the counter itself (depending upon distance from the wall - the further away, the less darkening), but it's not as harsh as what appears on the backsplash.  However, after taking another look at this in game today, the problem extends to the counters themselves now (if it did in the past as well, I hadn't noticed it).  Here's an image of what I'm seeing: