Creating MLOs, Interiors, and 3D Models for GTA:V
I'll start off by saying that I am no expert in this subject. However, I did learn just enough to put together what will become the most influential tutorial for modding and working with GTA:V interiors. The process is long. It's daunting and can easily be one of the most satisfying things you can do with GTA:V.
Without further ado here is that tutorial.
Here is also a larger document to go along with it.