Free models from unknown authors

[Dragofer]

It occurred to me that I'm still missing credits for 2 models that I found on free online repositories. Checking those websites again, it turns out that they don't state anywhere who made any of their models (one of the websites says it's for 3d printing).

This makes it very doubtful whether I can use these models, because it's possible they're being distributed on these websites without their authors' consent. Is there maybe some hope for something that could redeem my use of these models?

[grayman]

Perhaps take a snapshot of the model and let Google do an image search. Might turn up the author's site.