Касаемо mixamo, а разве это можно использовать в коммерческих целях?
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Adobe picked up Mixamo and killed the stock character side, favoring Fuze. As you said, it's free for commercial use as long as the content is inseparately embedded within your project. That means it's the typical stock model type license. You can use the thing, but you can't sell it on it's own or in an asset pack.
Там прикол в том, что ты продавать от своего имени не можешь что-то от mixamo, но можешь коммерчески использовать в проектах