PS: Creating Specular Maps v3.6 for FSX, FSX:SE & P3D.
PDF file containing instructions for Photoshop Family Only.
How to... In Creating a "Specular" Map with using material masks.
a. NVIDIA Texture Tools (NVIDIA Normal Map filter, NVIDIA DDS plug-in, Mipster, Cube Map Shuffler). Make sure you have the latest release date.
NVidia Graphics (Display) Card is Not Required.