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