Venompapa

Hello, i would have couple question about this mod because kinda got me confused, i got here when i was searching graphics enhancement mods for KSP if not all of them but most of them led me there about i need this. So what i would like to know if this mod actually changes anything in the base game or just its allows to do planet modifications? Also im wondering if i install this its would still allow me to join LunaMultiplayer servers? Thanks you.