Architecture
One of my school advisors came to me after hearing that I knew how to use 3D software. He asked me if I could help him draft architectural sketches to build a family home for his family/friends in Sierra Leone. I was happy to help.
Over a couple of months, we worked together to identify what features he would want in this house, and then iterated on designs.
Now, the designs have been sent halfway across the globe to be built in Africa.