It sounds like you're referring to a modded or enhanced version of Grand Theft Auto: San Andreas – The Definitive Edition, possibly tied to a username like "gi3p4rd" or a specific patch/fix labeled "re better" (maybe a fan improvement over the official “Definitive Edition”).
Conclusion
Grand Theft Auto: San Andreas - The Definitive Edition - Steam gta san andreas definitive edition gi3p4rd re better
These community videos demonstrate the dramatic difference between the launch version and the modded/updated experience: It sounds like you're referring to a modded
The project is often cited as making the game look "Better" not by adding polygons, but by removing artificial filters. Gi3p4rd released patches that: gta san andreas definitive edition gi3p4rd re better