What is fishstrap-fastflags?

This repository is a reference guide, not a piece of software you install. It lists Roblox FastFlags, internal settings that control how the Roblox game engine renders graphics and handles stability, for people who use Fishstrap on Windows. Fishstrap is a separate launcher for the Roblox client, built as a fork of an earlier project called Bloxstrap, that gives players a built in editor for these flags along with extras like uncapping the frame rate, showing Discord status, and clearing cache files automatically. Since late September 2025, Roblox only allows a small approved list of these flags to be changed locally, so older guides that reference other flags no longer work. This guide focuses only on flags confirmed to still be on that approved list, covering three areas: rendering and performance, such as how far away detailed models get simplified to save on frame rate, stability and video memory, such as lowering texture quality so graphics cards with limited memory do not crash, and windowing behavior, such as how fullscreen mode is handled and whether the display respects Windows scaling settings. Rather than asking a reader to pick individual settings, the guide bundles them into three ready made presets: one for low end or integrated graphics, one balanced preset for mid range graphics cards, and one for maximum visual quality on high end systems. Each preset is a small block of settings that can be pasted directly into a configuration file that Fishstrap reads, or applied through Fishstrap's own flag editor. The guide also explains, in plain terms, why each setting matters, for example how reducing model detail at a distance improves frame rate without changing how objects behave up close, or why forcing top tier texture quality on a card with little memory can cause crashes. The README also warns about deprecated flags and includes a section on security and anti cheat risk, though those specifics were not fully covered in the material provided here. Translations of the guide exist in several languages besides English.