what happened to roblox shaders and better lighting?

Two things killed most of them. Roblox added a new anti-cheat in 2023 that broke a lot of the injected shader packs. Then in 2025 it limited which fast flags players can change, which wiped out most of the lighting tweaks people ran through Bloxstrap. The in-game lighting is also chosen by each game's developer, so a player can't force Future lighting on a game that wasn't built with it. Graphics quality maxed out is the most you get from the client side.