In this tutorial we will be taking a look at how to fix black textures and materials when importing models to any engine.
This problem comes from having multiple UV Maps with different names.
...
in this tutorial i show you how to use the render to texture script from tutorialsforblender3d.com. I go over how to use it as security camera's and gun scopes although it can be used for many ...
Easily Texture your Terrain Landscapes in Unity, Unreal Engine 4, UDK Torque 3D and Cryengine (Texture Splatting) using Alpha Channels to Blend landscape Textures together.
Source