Problem when render/imprt model (skethcup & blender) interior mode

[sibawal]

hello guys,
first of all i've been using keyshot since keyshot 6 and it look great for me
but recently i try use keyshot 8 and i encounter some problem in interior mode
i try to raise the sample up, playing with global illumination and ray bouces but it seem not working
also i try to round edge, change the material type as well but it seems none is working also.
well as you guys can see in this image below is my problem.


this image is model from sketchup and render in basic lighting


and this one is same from sketchup but render in interior mode


and this one is render in interior mode but the model is from blender

what i want to ask is why model from sketchup, looks terible
in interior mode, and i never enocounter this problem before in keyshot 6 or 7

for refrance i put some of the render in interior mode also


this one is render in keyshot 8 (interior mode) skethcup model


and this one is render in keyshot 7 (interior mode) sketchup model

if its becouse not enough geometry in sketchup model, well i never find this problem in keyshot 6 or 7
it just happend when i try in keyshot 8, maybe you guys can help me with this
Thanks a lot

please forgive me about the noise or if my render its not good enough