STUDIO BLACK SHOWROOM
Here is a custom made showroom which is good for taking screen shots of cars or mods as well as different car skins.
To install drop the contents in Steam/steamapps/common/assettocorsa/content/showroom
It is still a work in progress and isn't perfect but it's the best I've managed to get it so far.
By default it's a bit dark so you may need to increase the exposure.
Thanks to Pankykapus for the feedback
HERE ARE SOME EXAMPLES
Studio Black Showroom 1.0
Custom made showroom which is good for taking screen shots of cars, mods or skins