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Controls texture detail and usually affects VRAM far more than raw FPS.
FPS
Very low
Visual
Very high
VRAM
Very high
CPU
Very low
Latency
None
What it does
Higher textures keep surfaces sharper at close range. Performance is often similar until memory pressure causes streaming stutter, missing detail or sudden frame-time spikes.
Games may also call it: Textures, Texture Detail, Texture Resolution
Decision guide
Lower it when
Lower it when VRAM is full, textures stream late or traversal produces repeated stutter.
Keep it high when
Keep it high when memory headroom remains and surface detail is visibly better.
Handheld advice
Shared-memory handhelds need enough reserved memory for the game and Windows; do not judge textures by average FPS alone.
Restart
Usually not required
Some games still apply changes only after reloading a scene or restarting.
Do not overread the meter
Texture packs and engine streaming behavior can change the memory cost drastically.