Hello, I am not a copyright expert but there are a few things that should be obvious :) Logos and Brands are all copyright protected, so they can not be used for resale purposes. Ie the Nike logo on a 3d t-shirt. I'm not sure if a fridge or car design is copyright protected, but I'm kind of doubting that since there a plenty of fridges and 3d cars out there for sale. Creating a look-a-like morph of a famous person for 3d characters is ok too, since nobody actually has a copyright or patent for their face or body.

I hope that helped.

Antje