It's purely cosmetic and only changes some user interface elements to create, IMHO, a cleaner and more modern overall look for Ghost Recon. If you're familiar with my Heroes Unleashed mod you'll notice similarities, and this is indeed based on the UI of Heroes Unleashed. There are small differences though, some of which will be implemented in the next update to HU.
I did this to provide an updated look for GR in a compact mod that only addresses core UI visuals and does not otherwise interfere with the game or other modded content. It is therefore compatible with most mods out there and won't change e.g. customized menu screen backgrounds.
Anyhow, the Decennium Interface mod features:
- New menu and loading screen styles (not backgrounds)
- New mouse pointer
- New PDA design
- New Command Maps with grid overlay for GR, DS, and IT maps
- New Platoon Selection background
- New Command Map Interface CMI
- New Head-Up Display HUD
- New reticles (standard shape, but e.g. new pips and red color)
- New Threat Indicator
- New night vision
- New weapon scope view
- New rangefinder/binoculars view