@Gunman: thanks for comment.. hmm.. for the render settings, i use like this :
exterior lighting :
mrSky light only -> multiplier=1, horizon height= -1.0, Red/BlueTint=0, Saturation=0.8
interior lightings:
pake photometric light+IES dan tipe shadow nya "Mental_Ray_Shadow"
Backrground : mrSky map
no mrSun