White floor, distant black walls, one of the typical studio setups for glamour shots.
Unzip into Steam\steamapps\common\assettocorsa\content\showroom\
If you don't want the walls, you can replace 'white_showroom.kn5' with the included 'white_showroom_no_wall.kn5'. I think it looks better with the wall.
White Showroom 2015-04-04
In Case You Want A White Floor