I am PhD student at the University of Illinois. My research area is analyzing transportation infrastructures. I have recently come across sketch-up and I must tell you that I love it! However, when I searched if I could use the models from 3D Warehouse in the papers and books I am writing I saw this:
Can I include models from 3D Warehouse in the research project I am publishing?
Answer: No, this is impermissible aggregation. You need an approval of each developer.
So, my question is that how I can get approval from each developer? Is there a form or something? Any help would greatly be appreciated!