QualityLevel

Controls the rendering quality of the game. Higher levels correspond to higher quality graphics.

As QualityLevel increases, Roblox rendering engine increases the rendering distance, shading quality, apparent geometry and texture resolution, limits on particles that are being rendered, fidelity of trail effects, post-effect quality and more. On low quality levels some post effects may be completely disabled and objects that are far away will not be rendered.

The specific effects of quality level on the individual elements of the scene or individual rendering features are platform- and device- specific and can not be relied upon.