I am using 2018 Home Designer Professional. I have a wonderfully powerful computer and Gforce 750 all up to date.
I reset the Ambient Occlusion settings starting at 10 to 15 %, This did not have any effect on the blurred (hazy)corners and the lighting is also blurred.
I have tried to change the wattage of the bulbs in the recessed lighting and this did not help.
I did remove all ceiling lighting and yes I got Less< blurring (hazy) corners, trim etc.
Here is a pic.