First off, I would like to introduce myself.  I have been Trolling this forum for about a month absorbing what I can.  I bought a derringer and need a holster for it.  Bad Part is they dont commercially make what I am looking for.  Next step. Research, Design, and make my own.  I have limited LW experience, which includes a merit badge from Boy Scouts 15 years ago.  Mainly Stamping and Basic Stiching. 
I have been using AutoCAD since 1995, Version 12.  I have a certificate in 3D Modeling, but was not aware you could flaten out the designs.  I know you can get any 2D View from any 3D model.  Question: If I make a 3D Model/Design, How do I flaten it out?  With the accuracy you can achieve in AutoCAD, Modeling the Gun would be the easy part.  Drafting the 3D Holster would be fun, but I am unsure how to flaten it out.  Any Suggestions will help.  Thank you for your time. 
Frank