Weird graphics issue rMBP 2012

[hsouris]

So,

I updated my Sierra laptop (rMBP 15" 2012) to High Sierra, the 10.13.1 release (I skipped 10.13), and I noticed this issue right from the start. Of course, I rebooted, but nothing changed.

One thing, though. This issue appears when the laptop is running on the Intel card. If I switch to NVIDIA, using gfxcardstatus, it is fixed.

Any ideas on what I can try?

Thanks

EDIT: Also, it's not happening on my Guest account.

 

[hsouris]

I found it: it was the reduce transparency setting under the Accesibility preferences. ‍♂️