Installation:

Simple run the file "SU-25T Roughness Maps (for DCS).exe". Please check if the default install path is correct, if your main game isn't installed under "C:" just change the Driver letter on the path.

The installer will just install a folder called "WorldTexturesBMP2" under: \\Program Files\Eagle Dynamics\DCS World\Bazar\World\textures\WorldTexturesBMP2

If you change completely the installation path, make sure you add this folder "WorldTexturesBMP2" because the files need to go inside it.

The liveries there are just samples for you to have some examples of description.lua files with the RoughMet map added lines and the roughness .dds files are samples as well (bare metal and default roughness).