You can't copyright a generic car as you say but there are still elements that might be trademarked and outright remaking a model 1:1 in Daz is probably still copyright and/or trademark infringement. I'm not much a car guy but BMW has a very distinct grille that is part of their trademark. Or think of a Coke bottle. You can't trademark a bottle but the Coca Cola bottle is really distinct and thus trademarked (If it has the vertical lines that is otherwise it is just a bottle).
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To be clear: Trademarks, Patents, & Copyrights are three VERY different things, with very different laws.
Your argument is incompetent, irrelevant, and immaterial; Trademarks and patents do not apply to this discussion.
Patents and trademarks are not part of the DMCA which addresses only enforcement of copyrights.
If you receive a DMCA complaint about a patent or trademark, you should contact an attorney, and possibly sue the complainant for false allegations. Juries have awarded damages in such cases. It is a blatant abuse of the DMCA to make false claims. 80% of the claims received by Google are false claims.
As for trademarks.
Generic Daz characters are not patented or trademarked.
Bayer lost it's trademark for acetylsalicylic acid "Aspirin" because it became a household word.
Google lost it's trademark, because it became a household word. A verb meaning to search the internet: Google it.
Xerox successfully defended it's trademark, by advising clients not to refer to the process of photocopying as Xeroxing.
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You suggest that copying the design of automobile parts 1:1 may infringe... this is False. Aftermarket automobile parts are quite common, and allowed despite the fact that the aftermarket auto parts directly compete commercially against the OEM manufacturer's sales. (Patents are not intended to prevent creative invention improvement and advancement of technology) If your version is BETTER* that the original... it does not infringe the patent. *better, is the most abstract of concepts.
aftermarket BMW Grille...
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IBM paid millions of dollars to develop the PC their patents did not prevent others from competing with them.
Copyright: is the exclusive right given to the creator of a creative work to reproduce the work, usually for a limited time.
The creative work may be in a
literary, artistic, educational, or musical form. Copyright is intended to protect the original expression of an idea in the form of a creative work, but
not the idea itself.
Not the idea itself. This is where most people are confused about copyright. It does not cover the concept it only covers the work itself. This means that I can make one just like it.
For example a publisher may sell cookbooks that contain recipes. You want to sell cookies made using those recipes, go for it. If your grandmother is a great cook, and you ask her to make up a cookie recipe for you from scratch... and off the top of her head, without looking at that cookbook, your grandmother comes up with a recipe of her own which is 98% identical to the recipe in the cookbook, her recipe does not infringe the copyright of the publisher. Grandma can publish her recipe