The modification slightly improves the graphics of the game by replacing the "particle.txd" file, which contains textures for the particle system and is mainly responsible for visual effects.
After installing the mod, the game will display water and sky differently (high resolution photo textures are used), sun glare and halos, blood stains, explosions, rain, effects of shots, fire and other particles.
I think this is one of the best if not the best mod that replaces the "particle.txd" file. The game should look nice with mods that change the textures of the environment.
As a bonus, the archive contains the "generic.txd" file, which contains improved asphalt textures on the first island and trees. Also included is the latest version of ENBSeries.