Info 2 [Q] Info on contact photos

Hi,
I don't have ant contact saved on phone nor sim.
All my contacts are on google account synced to my Note.
I have added photos to account appearing on phone under my google account.

I want to ask if I install custom rom or format my phone,what will happen to photos of contact. I mean after restoring google account back on phone, will photos appear as now or will be blank?

I repeat, no contact is on phone or sim, all are on my google account synced to phone.

thanks in advance.