HELP with White environment

HI, I am trying to create a white infinite environment in UE4. I am using a HDRIBackdrop with one light source + postprocess volume within a big round white cylinder but the white looks washed out plus still I have some areas with some horizon shadow. Does anyone have any tips on recreating a white environment? I have attached a previous visual I made in C4d/Octane and a reference image to the kind of look I would like to get. Any help will be very appreciated. Thanks
UE4 Visual

C4D Visual

Reference Image