Render issue with keyshot 8 interior mode

[sibawal]

hi guys

first of all i post my question also in
https://www.keyshot.com/forum/index.php?topic=22903.new#new
im sorry for this

i just wondering if i put the topic is right in there, so i post in here also
my question is why i get difrent result in interior mode with keyshot 7 and 8 and
maybe some one in here can tell me what did i do wrong

this 2 image is render in interior mode
i use same hdri aversis bathroom
shadow quality 2
ray bounces 16
Gi 10
its a basic setting for interior mode
and the material is velvet white
but one on top is render in keyshot 7 and the bottom one is render in 8





as you guys can see in keyshot 8 i got some hard edge or geometry in the back pillow
maybe anyone encounter this same problem like me and know what should i do
i already try diffrent seetting also in keyshot 8 like raise the GI, shadow quality, ray bounces and material also
i use imac (mac os siera, intel core i7, ram 16gb and nvdia gt 750)
thanks

[sibawal]

another interior problem