Not everyone needs the full package. Some people play on servers with active admins, some don't want to get caught using an aimbot, and some just want to see enemies through walls. Renthal Lite is the stripped-down version of Renthal External. ESP only, visuals only. No aimbot, no bullet manipulation of any kind. You see your opponent at 400 meters, you see their weapon, you see where they're looking. The rest comes down to skill.
The architecture is the same as External. The cheat doesn't inject into the Rust process, it runs through a driver at the system level. EAC looks inside the game, Renthal sits on the outside. The launch requirements are standard: turn off Hyper-V and Secure Boot in the BIOS, a minute of work. Updates ship together with the main Renthal version. It's lighter on resources than the full version. A good fit for weak PCs or for anyone who doesn't want the extra stuff. People mostly buy it to play without aim, since Rust isn't purely a PvP game anyway. If you live in some summer biome where everyone is peaceful, all you need is to run around, steer clear of people with weapons, or stay out of sight when someone is looking for a target to rob.