The --quality or --q parameter changes how much time is spent generating an image. Higher-quality settings take longer to process and produce more details. Higher values also mean more GPU minutes are
The default --quality value is 1.
--quality only accepts the values: .25, .5, and 1 for the current model. Larger values are rounded down to 1.--quality only influences the initial image generation.
--quality works with Model Versions 4, 5 and niji 5.
The Influence of Quality on Jobs
Higher --quality settings aren't always better. Sometimes a lower --quality settings can produce better results—depending on the image you're trying to create. Lower --quality settings might be best for a gestural abstract look. Higher --quality values may improve the look of architectural images that benefit from many details. Choose the setting that best matches the kind of image you're hoping to create.