JohnnyEnglish tutorial Creating a new Urt5 map
Starting out
Firstly, I'm going to assume you have a fully tested idea for a map, perhaps you've previously built a rough version and tested it on Urt4 and now you want to build it. For this tutorial I decided to make a map very much like dressingroom, a small 2x2 fun map, mirrored.
This tutorial will not teach you how to use Blender or any other 3d tool, but what I demonstrate should be transferrable as a technique to whatever tool you decide to use.