very old books 3D 模型

Yes, If the model is under Royalty Free license , you can use it as long as it is incorporated into the product and as long as the 3rd party cannot retrieve it on its own in both digital and physical form.

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Licenses marked with the "no AI" designation do not grant permission for utilizing the product in tasks related to machine learning or the training of neural network models, including generative AI models.

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