Copyright and trademark infringement are like speeding and running stop signs. They happen constantly and relatively few instances actually result in court action.

Does that mean that it's safe to speed and run stop signs?

That's entirely up to you. If you think it's safe, feel free. Do it. Suffer the consequences if you're wrong.

However, when you get into a taxi, you can't expect them to speed and run stop signs just because you think it's safe.

Likewise, if you want to offer freebies that contain other people's IP, you are totally free to upload them to your own server and give them away. If that results in DMCA takedowns or a suit against you, it's still entirely your choice to take that risk.

But you can't expect Renderosity to list those things.

Renderosity is like the taxi driver. They have to make their own decisions about the risks they are willing to take.

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We aren't sniping at you. We're just offering you some free personal advice. If you want better, actual real legal advice, you NEED TO TALK TO AN IP ATTORNEY.

Copyright law IS confusing, and like just about every other area of law, it is not enforced reliably or consistently. That's just how life is. It doesn't always make sense.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.