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Genshin Impact is notoriously heavy. GLTools can downscale textures to 0.5x and reduce your render resolution to 0.75x. This turns a slideshow (10–15 FPS) into a barely playable but tolerable 25–30 FPS.

Before using GLTools, it is crucial to understand the potential downsides, which can be severe.

GLTools functions by prioritizing performance over visual fidelity. Mobile GPUs often struggle because they attempt to render high-definition graphics on high-resolution displays, causing overheating, thermal throttling, and lag. GLTools breaks this cycle through targeted adjustments: