found this in the royalty free licence agreement:
" For illustration, approved distribution or use of Product as Incorporated Product includes, but is not limited to:
- as rendered still images or moving images; resold as part of a feature film, broadcast, or stock photography;"
I would say that it would fit under this category. Just make sure that the model you download isn't the main thing featured in your renders and that no files of the 3D models are resold.