In this tutorial I added a script to open the door when an FPS player enters a trigger. This is a simple task for beginners to Unity and programming with C#, in the next one we will add user interactions for opening and closing the door.
See my social profiles here
G+: https://plus.google.com/+JayAnAm
Twitter: / jayanamgames
Facebook: / jayanamgames
Patreon: / jayanam
Indiegogo: / jayanamgames