I create motion graphics by purchasing 3D models with a Royalty Free or CC0 licence for commercial use.

For example, you can create various interesting compositions with mountains and HDRI backgrounds with paid and free commercial licences. When rendering projects, we definitely have legal copyright to the animated graphics.

But do Adobe and other agencies make an issue of this?

I read the technical requirements on the Adobe website and found the following statement.

Don't submit content that's partially based on the work of other artists.

https://helpx.adobe.com/stock/contributor/help/ip-guidelines.html

They contradict themselves, after all, copyright to the work and files is sufficient.

Does anyone have experience with this?

Don't submit content that's partially based on the work of other artists. But they accept AI slops - go figure!

Sorry can't help much only submit work that I've made myself but CCO looks ok to me. Can you check with Adobe, maybe the discord or Adobe forums to see if they would accept submissions that include CCO licensed work?

I asked Adobe:

For graphic animations, I legally purchase various add-ons, textures, and HDRI with 3D models under a Royalty Free or CC0 licence for commercial use.

As the author of the compositions and renders I have created, I own the copyright to my work.

However, I have a question about the technical requirements for uploading files.

What does it mean: Do not upload content that is partially based on the work of other artists?

https://helpx.adobe.com/stock/contributor/help/ip-guidance.html

Reply from Adobe:

You warrant that you own all rights, title, and interest in and to the files you submitted.

You must own or control all the rights to files you submit to Adobe Stock. Don't submit files that don't belong to you (for example, photos that your spouse took) or that incorporate items that are not yours, such as content found on the internet including sites that allow free downloads.

You cant incorporate anything into your content that was created by someone else, not even images you got from a website that allows free downloads.

It is still unclear whether legally purchased 3D models under a commercial licence or CC0 textures can be used for compositions in graphic animations.

You cannot use the 3D model you purchased because you do not have the copyright to it, only a commercial license.

'You must own or control all the rights to files you submit to Adobe Stock. Don't submit files that don't belong to you (for example, photos that your spouse took) or that incorporate items that are not yours'

 I heard someone here a forum member, i don't remember his user well, it begin with something like "Space". He told use public domain content in his creations, most of the NASA. I remember that.

You're wrong. If you buy a 3D model under a commercial or CC0 license and create your compositions using animation graphics, the seller of the 3D model doesn't own the copyright to the animation graphics. Otherwise, why would the 3D model creator sell them, and to whom?

Yet Adobe accepts elements from other photographers, like NASA, which are used in animation graphics. There are thousands of such animation graphics and images on their website with descriptions.

But why do they write about this in their terms and conditions?

Don't submit content that's partially based on the work of other artists.

I also asked Shutterstock if it's possible to use free textures or HDRIs under the CC0 license for graphic design, animation, and imagery.

Can I use legally purchased 3D models under the Royalty Free license and, with the authors' consent, create my own compositions for graphic animations?

Answer: Contributors cannot use CCO, royalty free or public domain work in their content, sorry. All the content submitted must be of their own creation and copyright.

I disagree with stock agencies. Since a derivative work is also subject to copyright, what are they even talking about?