Can I modify a cad file and use it in an unrelated commerical application to help with visualization?
I just need a background cad file to show a conceptual design. The car cad file is not specific to the concept but helps in the Visualization.
Accepted answer
Ask the designer for permission first...
Read these:
https://help.grabcad.com/article/246-how-can-models-be-used-and-shared